Re: [pinhole-discussion] Type of paper for pinhole prints
Hi Traci, I got some pictures too, but didn't have time to start sending mines yet. I usually have a photolab printing them to me, but any aproach you choose will be OK I believe. Best regards Joao - Original Message - From: "Traci Bunkers" To: Sent: Thursday, December 11, 2003 10:22 PM Subject: [pinhole-discussion] Type of paper for pinhole prints > I have already been getting some great pinhole cards from the swap. A few of > them look like they have been printed at a photo lab--the paper doesn't look > like ink jet photo paper. The main ones in question are Marcy Merrill's. I > need to print my photos for the swap and wondered how these people did it. > They look so nice! > > Thanks! > -- > Traci Bunkers > Bonkers Handmade Originals > http://www.bonkersfiber.com > > > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Re: road trip - Colin
Hi, Email Guillermo, he's the one making them. pen...@rogers.com Cheers Joao - Original Message - From: To: Sent: Wednesday, October 22, 2003 4:26 AM Subject: [pinhole-discussion] Re: road trip - Colin > Hey Colin - > > Where did you get the Sieve? I want to try this, but haven't had any luck > finding one with a 120mm focal length. > > Thanks, > Heller > > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Yashica-D Twin Lens Reflex
Hi, I converted one of these cameras to use with Guillermo's photosieve. I only removed the photo lens and kept the focusing one (the uper lens). The lens can be removed by unscrewing the front element that comes out in one block and by doing the same thing at the rear block. The rear block is more complicated to unscrew, you will have to use a silicon cilindrical block that is strongly pressed against the lens' rear element and turned counter clockwise. All you will have left is the shutter and the diafragm, that can be used as a vignetting device. If you intend to use the camera with azoneplate or photosieve, you'll have to determine the focusing distance you want and mark it, so the camera when brought to use will have the focusing knob set at the position marked to give you the proper focal distance. I hope you could understand the procedure, it is really simple but my English is difficult ;) Best regards Joao - Original Message - From: "George L Smyth" To: Sent: Tuesday, October 21, 2003 6:00 PM Subject: [pinhole-discussion] Yashica-D Twin Lens Reflex > > I received the below from a friend of mine. I am unfamiliar with the camera, so hopefully someone will be able to give me an answer to send back to him. > > > I just acquired a Yashica-D Twin Lens Reflex camera, and I was > > wondering if you know of anyone who has converted such a camera > > for pinhole photography. The problem is that the lenses are > > permanently mounted to the camera. > > Thanks for your help. > > Cheers - > > george > > - > http://www.GLSmyth.com > http://DRiPInvesting.org > > --- On Tue 10/21, George L Smyth < glsm...@myway.com > wrote: > From: George L Smyth [mailto: glsm...@myway.com] > To: pinhole-discussion@p at ??? > Date: Tue, 21 Oct 2003 15:46:16 -0400 (EDT) > Subject: Re: [pinhole-discussion] road trip > > Gordon -Your idea is a dangerous one. I've got some similar film on a massive roll, and the idea of sticking the whole thing into a pinhole camera is giving me the shivers. Cheers -george-http://www.GLSmyth.com http://DRiPInvesting.org --- On Tue 10/21, Gordon J. Holtslander < hol...@duke.usask.ca > wrote:From: Gordon J. Holtslander [mailto: hol...@duke.usask.ca]To: pinhole-discussion@p at ???Date: Tue, 21 Oct 2003 12:24:21 -0600 (CST)Subject: Re: [pinhole-discussion] road tripFor the adventurous:How about a camera that uses a roll of my favorite ortho filmkodak camera 2000 cgp. Its available in rolls 6 inches wide 200 ft long.You would have to cut shorter pieces of film and make rolls out of these.It doesn't have backing paper - so it wouldn't be as easy as medium format- the camera would have to be loaded in the dark.I don't think it would be too har > d to make a large format roll filmpinhole camera. You would have to load the roll in the dark or undersafelight, but you would be able to make something that can take bunch ofpictures.see page 2 ofhttp://www.kpgraphics.com/pdf/info/FilmAndPaperProducts.pdfals o available in widths of 10, 12 14 etc to 52"Gord_ __No banners. No pop-ups. No kidding.Introducing My Way - http://www.myway.com___Post to the list as PLAIN TEXT only - no HTML Pinhole-Discussion mailing listPinhole-Discussion@p at ???unsubscribe or change your account athttp://www.???/discussion/ > > ___ > No banners. No pop-ups. No kidding. > Introducing My Way - http://www.myway.com > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
[pinhole-discussion] PS4
I'm in. Joao Ribeiro Rua Drausio 466 05511-010 Sao Paulo - SP Brazil
[pinhole-discussion] PS4
I'm in too. Looking forward to it. Cheers Joao
Re: [pinhole-discussion] 120 mm zone plate
Hi folks Sorry to send this message to the list, but I'd like to contact Guillermo and I lost his email address. Please, could you contact me Guillermo jribe...@greco.com.br Thanks folks Joao - Original Message - From: Guillermo To: Sent: Monday, March 10, 2003 8:02 PM Subject: Re: [pinhole-discussion] 120 mm zone plate > > - Original Message - > From: "Daniel Bouman" > > > > have never used a zone plate before. I've just received a 120 mm f/80 > for > > use on a field camera and I have a few questions which I hope some one > will > > enjoy answering. It seems to me that I should set the camera's front > > standard 120mm from the film plane. > > Yes, a 120mm lens, be it Schneider, Nikon, Canon, etc. or Zone plate, is > made to focus "sharply" subjects at infinity when the lens is placed 120mm > from the film plane. > > > If so, what are the near and far > > limits of the field of "sharp" focus. > > Those are subjective limits with glass lenses, more so with pinhole and even > more so with ZP or pinhole sieves. Having focal length and f/stop you can > find those limits for your subjectivity by applying the lens formulas > available in the lens faq (google find the faq) > > > I've read that zone plates don't have > > the universal field of focus that pinholes have and can be focused. > > Yes, that's 'cause they do focus light. > > > If I > > extend the bellows for a close in shot then I'm not using the zone plate > at > > the focal length it was designed for, right? > > If you extend the bellows and your subject is not at infinity, you are not > using the lens at the focal length it was designed for, and it doesn't > matter if it is zoneplate or your expensive Rodenstock lens. When you > extend the bellows, you are increasing the "effective" focal length of the > lens, therefore you have to reduce the distance lens to subject, they have a > reciprocal relationship, you increase one you'll have to decrease the other. > In short, it is OK to use the ZP for a distance lens to film longer than > 120mm, provided your subject is closer to the camera. Again, refer to the > lens faq to find out how much you should extend the bellows for a particular > distance lens to film. Having said that, I wouldn't worry too much, I mount > my > zoneplates at the "calculated" distance and use them like that no matter > where the subject of my picture is. > > > Or is it that the depth of > > field at f/80 is big enough to cover a subject at a foot or two from the > > camera? Any takers? Cheers, Daniel Bouman > > In practical and for "lensless" imaging purposes the answer is yes. In > mathematical terms, you would have to extend the bellows beyond the focal > length distance the lens was calculated for. > > For instance: for your 120mm ZP and a subject at 2 feet (609.6mm) from the > lens, the bellows should be extended > > F=focal length the ZP was calculated for > S=distance lens to subject > I=bellows extension > > I = (S x F) / (S - F) > I = (609.6 x 120) / (609.6 - 120) > > I = 149.4mm > > Hope it helps, > > Guillermo > > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/ >
Re: [pinhole-discussion] 35 mm pinhole camera
Hi Zami, Sorry for the late reply. The pinholes are 55 mm f 166 with a pinhole diameter of about 0.33 mm and a 105 mm f 318. Actually I prefer zone plate 35 mm photography, I don't like 35 mm pinholes (At least I don't like mine). I'll keep using the 4x5 cameras with pinhole. I transformed the 35 mm pinholes into 2 new plastic lens to use with the camera. Now with this 35 mm camera and the extension bellows I am using 55 and 105 mm zone plates and 390, 210 and 150 mm plastic lens, one of them in even a composition of a positive and negative lens to give me a usable focal distance. Cheers Joao Zami Schwartzman wrote: > Joaothanks for your reply Did you try a pinhole with it ? I wander > whe hole size and focal lengt and what are the resultsZami > > -Original Message- > From: pinhole-discussion-admin@p at ??? > [mailto:pinhole-discussion-admin@p at ???]On Behalf Of > Joao Ribeiro > Sent: Sunday, October 13, 2002 12:35 AM > To: pinhole-discussion@p at ??? > Subject: Re: [pinhole-discussion] 35 mm pinhole camera > Hi Zami, > > I have an old Yashica XYZ, I don't really remember the > specs, but I found an adapter to use pentax thread lenses > with it (it transforms the bayonet into a thread). > I had some aluminum tubes made to fit this thread, so now it > is easy to change focal distances and/or transform from Zone > Plate to pinhole in no time. I even made a 300 mm plastic > lens with an old pentax extension bellows, the aluminum tube > and some black tape and it is working pretty well. > Cheers > Joao > > Zami Schwartzman wrote: > > > Anyone has tried converting a 35 mm camera to pinhole ? > > > > I have modified an old Pentax Spotmatics Reflex camera , > > the idea was that > > using a 35 mm format will make it easier to experiment > > with various types of > > films . film drive , sutter timing , tripod attachement > > and release cable > > are already there and any local photo shop will process > > the films for me . > > I turned a "lens" boby on my lath that allows the metal > > foil be located 28 > > mm from the film . > > I discovered that with this camera I can flip the mirror > > up permanently > > without disabling other camera functions ( except for the > > viewfinder that > > obviously is shut off ) > > > > I use 0.02 mm copper foil .The pinhole was made under a > > x70 stereo > > microscope by using a very sharp pin ( honed under the > > microscope ) on hard > > back surface . > > the buurs on the oposit side had to be very carefuly > > treated with no. 400 > > sandpaper to get a perfect hole . Although not a sraight > > forward job , I can > > get perfect holes as small as 0.05 mm diameter ( I have > > scale on the > > microscope ) . there is no chance to get any smaller with > > manual pin > > puncturing tecniques . > > > > I experimented with a 0.1 mm hole , got some good close up > > pictures well > > exposed with Kodak gold 400 ASA( using f: 120 on the light > > meter ) but the > > results are quite " out of focus " on 10x15 prints . > > > > I wander if going further to a 0.05 hole will worth the > > panelty in the f > > number . > > Is there an optimun hole size for best sharpness ? or > > is it the smaller > > the better . > > > > I hear that some people are converting plastic 35 mm > > cameras , I wander > > what holes they use and how sharp is the resultant image > > they get . > > > > Zami > > > > -Original Message- > > From: pinhole-discussion-admin@p at ??? > > [mailto:pinhole-discussion-admin@p at ???]On Behalf Of > > DAVID WALTERS > > Sent: Friday, October 11, 2002 11:29 AM > > To: pinhole-discussion@p at ??? > > Subject: [pinhole-discussion] Re: New to the list and > > saying "hello" > > > > Evening, I apologize for the lag time on answering but > > I had a brief episode of file overload while trying to > > upload some pics (Sorry and thanks, Gregg). I have a > > pinhole from my last roll posted at > > > > http://photos.yahoo.com/bc/wal...@prodigy.net/lst?.dir=/Photo+art&.src=ph&;. > > > &
Re: [pinhole-discussion] 35 mm pinhole camera
Hi Zami,
I have an old Yashica XYZ, I don't really remember the specs, but I found an
adapter to use pentax thread lenses with it (it transforms the bayonet into a
thread).
I had some aluminum tubes made to fit this thread, so now it is easy to change
focal distances and/or transform from Zone Plate to pinhole in no time. I even
made a 300 mm plastic lens with an old pentax extension bellows, the aluminum
tube and some black tape and it is working pretty well.
Cheers
Joao
Zami Schwartzman wrote:
> Anyone has tried converting a 35 mm camera to pinhole ?
>
> I have modified an old Pentax Spotmatics Reflex camera , the idea was that
> using a 35 mm format will make it easier to experiment with various types of
> films . film drive , sutter timing , tripod attachement and release cable
> are already there and any local photo shop will process the films for me .
> I turned a "lens" boby on my lath that allows the metal foil be located 28
> mm from the film .
> I discovered that with this camera I can flip the mirror up permanently
> without disabling other camera functions ( except for the viewfinder that
> obviously is shut off )
>
> I use 0.02 mm copper foil .The pinhole was made under a x70 stereo
> microscope by using a very sharp pin ( honed under the microscope ) on hard
> back surface .
> the buurs on the oposit side had to be very carefuly treated with no. 400
> sandpaper to get a perfect hole . Although not a sraight forward job , I can
> get perfect holes as small as 0.05 mm diameter ( I have scale on the
> microscope ) . there is no chance to get any smaller with manual pin
> puncturing tecniques .
>
> I experimented with a 0.1 mm hole , got some good close up pictures well
> exposed with Kodak gold 400 ASA( using f: 120 on the light meter ) but the
> results are quite " out of focus " on 10x15 prints .
>
> I wander if going further to a 0.05 hole will worth the panelty in the f
> number .
> Is there an optimun hole size for best sharpness ? or is it the smaller
> the better .
>
> I hear that some people are converting plastic 35 mm cameras , I wander
> what holes they use and how sharp is the resultant image they get .
>
> Zami
>
> -Original Message-
> From: pinhole-discussion-admin@p at ???
> [mailto:pinhole-discussion-admin@p at ???]On Behalf Of DAVID WALTERS
> Sent: Friday, October 11, 2002 11:29 AM
> To: pinhole-discussion@p at ???
> Subject: [pinhole-discussion] Re: New to the list and saying "hello"
>
> Evening, I apologize for the lag time on answering but
> I had a brief episode of file overload while trying to
> upload some pics (Sorry and thanks, Gregg). I have a
> pinhole from my last roll posted at
> "http://photos.yahoo.com/bc/wal...@prodigy.net/lst?.dir=/Photo+art&.src=ph&;.
> order=&.view=t&.done=http%3a//photos.yahoo.com/"
> ("badge"), along with some other pieces of mine. The
> body cap is on my Canon EOS, I measured the distance
> at 49 mm and I'm using a laser drilled opening of
> .0102", this gives an f/stop of 163, I reckon. Using
> the bulb setting has given me fairly good results with
> Kodak film, although it seems to be able to meter
> through the pinhole. The Polaroid pinholes are from a
> Polaroid 210 with a hand drilled pinhole, I had such a
> bad rolloff because of reciprocity that I have stuck
> with B/W since. I might go back to color with the 210
> and stick to extreme sun in the future, we'll see.
> Thanks for the welcome, David Walters
>
> ___
> Post to the list as PLAIN TEXT only - no HTML
> Pinhole-Discussion mailing list
> Pinhole-Discussion@p at ???
> unsubscribe or change your account at
> http://www.???/discussion/
>
> ___
> Post to the list as PLAIN TEXT only - no HTML
> Pinhole-Discussion mailing list
> Pinhole-Discussion@p at ???
> unsubscribe or change your account at
> http://www.???/discussion/
Re: [pinhole-discussion] ortho film
And for those lucky enough to live in Berlin/Germany or at least in Europe, you can try the Maco Ortho film, in sizes up to 8x10 at a very reasonable price. They also carry some pancromatic papers (Classic Arts RC Panchro). Try: http://www.fotoimpex.de I watched in the news things are terrible in mid Europe (Prague and Desden was it?) I hope you are OK there. Best regards Joao Jonathan King wrote: > On Fri, 16 Aug 2002 11:49:59 EDT, bendur...@aol.com wrote: > >I didnt realise that ortho and litho films are the same. > >does that mean litho film and be developed in trays under a red light? > >this is good news because I had been looking at the ilford ortho film and > >its a lot more expensive than litho film > >Ben > > They are not necessarily the same. As Joao mentioned, there is probably > Lith film that is panchromatic, & needs to be developed in total darkness. > Lith film is intended for line copy work and has no real gray scale unless > you start messing around with developers and exposures to lower contrast. > > The nice thing in my mind about the Ilford Ortho+ is that it is a normal > film, just without the red sensitivity. You can use any normal film > developer, but develop it with a red darkroom light. More expensive but > easier to use and with a nice tonal range. > > Jon > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] ortho film
Hello Gordon, > I use ortho film. Yes it can be developed under safelight. A standard > film developer will produce a high-contrast film - Ortho film is usually a > high contrast film. I don't understand the above statement.Doesn't Ortho mean "not sensitive to red" and Lith (from lithographic) means high contrast? I believe there is some lith film in the panchromatic range (sensitive to all colors), for analog color separation. Best regards Joao
Re: [pinhole-discussion] Slightly Off Topic
Scanners have some sort of depth of field too. I have already made some scans from my face a few inches away and it worked great, a bit too dark that was corrected with photoshop but not exactly out of focus. The only problems with glass plate might be newton rings (I'm not sure if they happen with glass against glass) and scratching the scanner's glass, so be carefull! Cheers Joao G.Penate wrote: > Scanners focus is optimized on the outer surface of the scanner's glass, > placing > the emulsion side face down may make a difference in the results (or not!). > > Guillermo > > > -Original Message- > > From: pinhole-discussion-admin@p at ??? > > > > Does anyone have experience scanning glass plate negatives? Can it > > even be done? A friend asked me to make contact prints from some > > glass negs he bought at an estate sale. Since my darkroom hasn't been > > reassembled after the big move, I thought scanning might work (haven't > > tried it yet, though). I have an Epson scanner with a transparency > > adapter (the extra light source on top). > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Test
Great!!! Another Brazilian. I hope you are a Corinthians' fan too! Best regards Joao luish m. coelho wrote: > ragowaring wrote: > > everyone knows what shape a > > football is - or do they? > > > > Pinhole! (I had to get that in to make it on topic) > > > > Alexis > > hi everyone, > > this is my first msg posted here, although I've been whatching and > learning a lot from you all for a few months now. > > being brasilian, soccer is a subject that moved me talk. > > to keep on topic, a soccer ball have a pinhole where the air goes in. > simliar to a basket ball. it would be challenging to build a camera with it. > but sorry, a baseball does not have a pinhole. > > ;-((( > > I find baseball a nice game, although boring and long, it has something > against this fast world we live in. > > []'s > luish > > -- > --- > http://www.ignore.com.br > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Test
Also, the games are in such a weird hours that I get sleepy all day! Let's see tomorrow. Joao G.Penate wrote: > - Original Message - > From: "ragowaring" > > > It has been very quite > > > > All busy I hope; or perhaps resting > > Could it be due to The World Cup of Football (the one played with feet not > with > hands), the biggest, wildest, and most watched sporting event on the planet. > It > makes the Super Bowl look like Little League. It makes the World Series look > provincial. It makes the nationalistic fervor of the Olympics look sedate. > All > the world but USofA+1/2Canada is tuned/glued to their TVs. > > Guillermo > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Pinhole Day Questions
Hi Guillermo, Thanks for the answer. Yes, it's been a long time. I'll try to update my page with some new zp images, but I haven't been shooting much lately. How about you? Will you shot the world soccer championship? I'll try to catch the best moments through the tv with my zp camera, I just made my first test during the pinhole day :) Cheers Joao G.Penate wrote: > - Original Message - > From: "Joao Ribeiro" > > > I have just had my pinhole day film returned from the lab. > > I am now in the process of choosing an image and uploading it. How should I > > proceed > > for the uploading? > > Thanks in advance, > > I'm looking forward to see the pictures made by you that day. > > Joao, > Just go here http://www.pinholeday.org/participate/submit.php > > Good to "hear" you again! > > Guillermo > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Pinhole Day Questions
Hi folks, I have just had my pinhole day film returned from the lab. I am now in the process of choosing an image and uploading it. How should I proceed for the uploading? Thanks in advance, I'm looking forward to see the pictures made by you that day. Joao
Re: [pinhole-discussion] Pin...ball shot
Nice photo Huges. I laso liked "jardins". What is that? It's very beautiful. Congrat. Joao Andy Schmitt wrote: > nice photograph... > you know, every time I get "lit" & shoot I get some really weird > photographs.. > andy > > -Original Message- > From: pinhole-discussion-admin@p at ??? > [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Hughes > Sent: Saturday, February 16, 2002 11:42 AM > To: pinhole-discussion@p at ??? > Subject: [pinhole-discussion] Pin...ball shot > > Hello all, > > This pinhole shot is "for amusement only" > > http://www.users.skynet.be/asveyou/pinball > > Sorry for the metaphor, as a french speaker, I'm not so sure about > its relevance but I couldn't resist any longer. > > Sometimes a photographer's life looks like that... Smashed into the > playground, you've got to turn lamps on, collect bonus on great > shots. The bolder is your trajectory, the better you succeed. And > finally, if you have been really good, you can SHOOT AGAIN :-) > > Hughes > > PS: I'm a horse of 1966. > -- > Atelier de Photographie > Hugues Mertens > http://www.users.skynet.be/asveyou > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/ > > ___ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Angle of ligh
Hi Ishikawa, Thanks for the ilustration. The camera is ready, I made it yesterday, and is almost exactly as you pictured, I made it with cardboard. The main diference is that film placed at the position "a" is also bended, U shape. The idea is producing a kind of a "triptico" (I don't know the name in English). I am not sure if it will work, but I'll give it a try and post the results to the upload galery. The next one will probably be a pvc cilinder with the film placed against the wall, forming a cilinder. Thanks for the help with the matter. Joao
Re: [pinhole-discussion] Angle of ligh
Thanks Bill and Guillermo for your answers. But ... > Geometrically/mathematically speaking, the angle changes when the > pinhole diameter changes, the change is so small tho, that in practice you > can dismiss it. Since you want to calculate the "cone angle", otherwise > known as "angle of view", here is a formula I just derived that takes the > pinhole diameter into consideration: > > Cone angle = ArcTan [ (D+P) / (2 * B) ] > > Where" > D = Diagonal of your film format > P = Pinhole diameter > B = Bellows extension (or focal length) > > As you can see, the effect of adding P to D is very small, i.e., for 8x10, > "D" would be equal to about 325mm if you add to that a "P" of 0.5mm, you get > 325.5mm, again, not a big change. The same happens if you change the > pinhole diameter. I'm not sure this is the answer to my question. If I could send a drawing attached to the list it would be easier, but this is what I want: I imagine a light entering the box/camera and forming a cone. This cone will be independent of film size. I believe it will vary with pinhole diameter but maybe not in a meaningful way. Let's say I made a very long focal distance box, no matter the film size, and at the end of the box, parallel to the pinhole plane usually is put the film. But I'll be using just a fraction of the image formed by this cone, the rest will be absorbed by the black walls of the camera box. Now, what I intend to do is to place 2 sheets of film not at the end of the camera, but at the walls that are perpendicular to the pinhole plane. I imagine that the light absorbed by these walls will also form images, certainly distorted (I believe someone in this list have already done that). How far from the pinhole plane the film should be to be completely covered by light? My imaginations tells me that if it is too close I'll have a "V" shape image. Is this formula you sent me able to give me that info? I'm asking because it takes into account the film diagonal and I believe this cone is independent of the film diagonal, I'm not sure. Sorry for this long post Joao
[pinhole-discussion] Angle of ligh
Hi folks, I have a question, but I'm not sure I'll be able to put it properly. Here it goes: When the light enters the camera, it enters in an angle the depends on the pinhole diameter or this angle is constant? Imagine I have a pinhole of 0.5 mm. If I make a bellows camera and set it to say 50 mm focal distance using an 8x10 film I'll have a very wide angle image. But if I enlarge the bellows distance to 500 mm I'll then have a telephoto image. Well, actually the image "cone" will be the same, I'm just choosing a section of the cone farther away from the pinhole or origin, and I am also selecting part of this cone to be recorded. How can I calculate the cone angle? Will changes in the pinhole diameter make any difference in this angle or it will always be constant? I hope I could make myself clear! Thanks in advance for any info, Joao
Re: [pinhole-discussion] 18 x24 pinhole/lens camera
Hi Alexis, I'm interested too! Joao ragowaring wrote: > Dear all > > I am scanning the chapter on making a quarter plate camera and will be able > to send a copy to anyone interested. > > Get this, quote: > > In this chapter will be described how to make a quarter-plate folding hand > or stand camera of a simple type, yet containing all necessary modern > movements and adjustments. > > How modern can you get > > Alexis > > on 21/12/01 10:14 pm, garfinkeldes...@aol.com at garfinkeldes...@aol.com > wrote: > > > Alex, that article seems interesting. I would like to be on your email list > > if > > you do send the article out. > > > > Please send it to we...@garfinkeldesign.com > > > > if you get a group that is interested. > > > > Thanks. Wendy > > > > ___ > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??? > > unsubscribe or change your account at > > http://www.???/discussion/ > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] developing ortho
In time, I'd like to add that Gordon is using a Kodak film that I believe is also RA. So, if you have the ilford developer at hand and would like to compare and report I'd appreciate it. Best regards to all, Joao
Re: [pinhole-discussion] developing ortho
Hi George, Recently I made a few tests with the ortho litho films I have. I used kodalith, Arista and Agfa darkroom RA. With the first 2 films, LC1 with the dilution recommended by Cor Breukel worked fine (water 750 ml, Metol 3 g, Sodium sulfite 60 g, Hydroquinone 3g, water to 1 l, to use dilute 1:4 with water and develop for 6,5 min at 20 o C), Iso rated is about 1. With the Agfa (and I suspect with all the RA films) the densities are still very high. I am using for this film Ilford multigrade liquid paper developer concentrated solution 50 ml to 4 l of water and I am getting pretty good results, times from 1,5 min to 4,5 min. depending on the density wanted, iso also about 1 at 24 o C. The 1,5 min development gave me a good neg. for gum. Cheers Joao George L Smyth wrote: > --- hol...@duke.usask.ca wrote: > > Hi: > > > > When processing ortho film for pinhole the objective is usually to obtain a > > normal continuous tone negative. This means one must drastically reduce the > > contrast of ortho film to be useful for pinhole - although there is nothing > > stopping someone from making high contrast negatives on purpose. > > > > There doesn't appear to be a commerically made super low contrast developer > > to make continuous tone negatives from ortho film. > > I've used Dektol in the 1+10 to 1+20 dilution (depending upon the scene). The > three images currently in the Alternative Processing Images section of my > website shows examples of this. These are not pinhole images, but were > created > through negatives that were made by projecting slides on halftone film and > developing with dilute Dektol. > > Cheers- > > george > > = > Handmade Photographic Images > http://members.home.net/hmpi/ > > __ > Do You Yahoo!? > Check out Yahoo! Shopping and Yahoo! Auctions for all of > your unique holiday gifts! Buy at http://shopping.yahoo.com > or bid at http://auctions.yahoo.com > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Will paper work in 4x5 film holder?
Just a suggestion, have you tried to fasten the paper with a scotch tape so the paper won't move inside of the holder? Since we are working under safety light it won't be a problem working this way. Cheers Joao Gregg Kemp wrote: > I've loaded paper in 4x5 film holders, and found it tends to wrinkle up, > because of its thickness. It can be done, but you may loose some paper > trying to do it. > > Gregg > > > -Original Message- > > From: Jeff Dilcher [mailto:r...@hiddenworld.net] > > Sent: Tuesday, December 18, 2001 10:39 AM > > To: pinhole-discussion@p at ??? > > Subject: RE: [pinhole-discussion] Will paper work in 4x5 film holder? > > > > > > > > I wonder if 4x5 enlarging paper will fit exactly in > > the sheet film holders? > > > > They should, but I haven't tried... > > > > -Jeff > > > > > > On Tue, 18 Dec 2001, Andy Schmitt wrote: > > > > > Why not? As long as you cut it the right side & put the > > emulsion facing out > > > ( 80) ) > > > it should be a very good method for holding it. > > > andy > > > > > > ___ > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??? > > unsubscribe or change your account at > > http://www.???/discussion/ > > > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Calculating accumulated flash for my pinhole camera...
Hi Guillermo, > Also, something called "intermitance" states that although mathematically 80 > f/22 flash pops are equal to 1 single BIG flash pop of f/197, in reality, > the effect of 80 f/22 pops is less than 1 BIG f/197 pop. Sort of like a > "reciprocity failure for flashes". Some more extra flash pops should be > added to compensate for that "intermitance" effect. Same happens in the darkroom, a test stripe with 5 x 2 sec test results in different densities than a 10 sec exposure on photo paper. I never considered it for flash pops, though. Maybe because of bracketing the exposures. I will have it in mind next time. Thanks for pointing it out. Joao
[pinhole-discussion] Interesting Site
Hi folks, Just came across this site and thought it might interest us, the pinholers. http://www.artandoptics.com/ It is about David Hockney's theory of artist using optical instruments since the 15th century. Cheers Joao
Re: [pinhole-discussion] Anyone seen any interesting work lately?
Hi Eric, Congratulations on you show. Please send us more, it's very nice indeed! Joao
Re: [pinhole-discussion] Darkroom door - suggestion needed
Hi Guillermo, I once visited a studio here where all doors, studio and lab, had a kind of a pre room, you had to close the first door and stand in this small room for a while and get some air circulating to clean dust before going into the lab. Pretty fancy but also pretty expensive. My home solution is a heavy cloth curtain wider and longer than the door placed right behind it, so when I'm in with door closed, the curtain cuts all the light leaks comming in. Have fun with your project, Joao
[pinhole-discussion] Double Slit
Hi folks, I was wondering what would be the difference between a pinhole and a double slit image? Can anyone help me with that? Do they look different? Where can I see one? Thanks in advance Joao
Re: [pinhole-discussion] Re: translation GORDY EMERY
Hi Alexis, > Paraffin oils have a boiling point in the range of 150 - 300 degrees > Centigrade while the wax has one between 50 and 60 degrees. Paraffin > wax is used for all sorts of things includeing cheap candles and waxed > paper. Actually I think you mean that paraffin has a "melting point" of about 60 o C > Camphorated oil on the other hand I would suspect is not strictly > necessary. The oil part yes, but the camphor part was probably used > as a preservative as some of you may remember camphor balls or > mothball ususally consisting of napthalene and sometimes, yes you've > guessed it, camphor. > Therefore, camphorated oil was probably used as an amplication for > preseving perishable non edible goods in the days of moths. Now all > of this is some educated conjecture but I hope it is of use to you. I > would think that oil would be sufficient. It's hard to say, in the wet plate process they used to varnish the plate with gum sandarac and in the formula they recommend oil of lavender. The oil is added for flexibility and, as I was told, it has to be lavender. I tried oiling papers with sunflower oil, it works fine but it goes rancid over time and smells pretty bad, so maybe the preservative is important. Paraffin (solid thing) works fine but the paper is fragile after, it marks easily (at least thin paper I use with ink jet printers). I have an old formula here that I have never tried, but maybe it works, who knows, it says: "To make paper transparent: Dip the paper in a bath at 80 o C of: Parafin (solid) . 40 gr. Linsen oil 10 gr. After the paper take up all the solution it cans, drain it fast and put it between 2 sheets of blotting paper." Will it work? Who knows, but why does he give the amount of oil in gr and not in ml? This formula dates from 1905, found it in a paper I have here and it has other curiosities. > I am just looking up in a dictionary that camphor itself is a whitish, > translucent crystaline, pleasant-smelling terpene ketone, whatever > that means except that most ketones smell nice from what I can > remember at school, used in medicine and in the manufacture of > celluloid. Ah ha! There it is, the manufacture of celluloid. Is that > not what one is doing when applying the camphorated oil to the paper > with paraffin? Probably not. Will sulfuric acid damage the gelatin part of the photo paper? I am working with an Arjo Wiggins Parchment paper called Linaje and they told me that the transparency is obtained by immersing the paper in a solution of sulfuric acid, washing, neutralising and buffering it after. Anyway, whoever got a good formula I'm interested in knowing. Cheers Joao P.S. I have an old formula for turning the wood black, but I don't know how to translate it, maybe Guillermo will help, it says: Extrato de Pau de Campeche .. 15 gr. (what the ... is that?) Cromato de Potassa ... 2 gr. (I believe it is "Alumem de cromo" ) Agua .. 1000 gr. He says to dissolve the Campeche first in hot water and add the Cromato. The solution is dark violet and becomes black in contact with the wood.
Re: [pinhole-discussion] Re: translation GORDY EMERY
Or you may try to find a store that sell products to manufacturers of cosmetics. > Or maybe a homeopathy drugstore. They use to manipulate a lot of stuff in > there. > > Ricardo. > > - Original Message - > From: Gordy Emery > To: > Sent: Wednesday, November 28, 2001 1:37 PM > Subject: Re: [pinhole-discussion] Re: translation GORDY EMERY > > > My father was a pharmocist and camphorated oil was sold in a drug store. > > But, today it is hard to find a (real) drug store. Most are more of a > > department than a drug store. I think to get camphorated oil one must > look > > for an old drug store. > > Gordy > > > > > > >From: Katharine Thayer > > >Reply-To: pinhole-discussion@p at ??? > > >To: pinhole-discussion@p at ??? > > >Subject: Re: [pinhole-discussion] Re: translation > > >Date: Tue, 27 Nov 2001 23:04:42 + > > > > > >b2myo...@aol.com wrote: > > > > > > > << mix together 8 cm3 of camphorated oil, 4 cm3 alcohol, add 1 cm3 of > > > > paraffin. > > > > Gently apply that mixture on the back of the paper using a batting. >> > > > > > > > > Can someone please translate this for me? > > > > leezy > > > > > > > > > >Was it the cm3 you wanted translated? That's cubic centimeters; like me, > > >you're probably more used to seeing it abbreviated as cc. But I think we > > >may need the paraffin translated as well. My understanding is that > > >Europeans mean something different by paraffin than the white solid wax > > >used for canning that we call paraffin in the US. And where does one > > >find camphorated oil? I assume a batting is like a cotton wad or ball. > > >Katharine > > > > > >___ > > >Pinhole-Discussion mailing list > > >Pinhole-Discussion@p at ??? > > >unsubscribe or change your account at > > >http://www.???/discussion/ > > > > > > _ > > Get your FREE download of MSN Explorer at http://explorer.msn.com/intl.asp > > > > > > ___ > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??? > > unsubscribe or change your account at > > http://www.???/discussion/ > > > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
[pinhole-discussion] New images
Hi folks, I have just sent this message but it seems to be lost in the web as it didn't showed up in my computer yet. So I'm sending it again, sorry if you get double messages. Hi folks, I changed my page a little. The address is: http://www.geocities.com/Paris/Rue/4414/zp/zpenglish.htm I'm not sure if everything is working properly, I hope it is. If you care to take a look I'll be pleased. If something doesn't work, please let me know and I'll try to fix it. I am including some pinhole too, not only zone plates. Cheers Joao
Re: [pinhole-discussion] Re: Blind photographer
Hi Guy, > ... not just in the field of > commercial/advertising where the photographer's role has essentially been > reduced to shooting "exactly" the mental image of the art director. > > Think of the word "Pre-visualization" that pervades all the Photo-101 or Zone > System textbooks. Pre-visualization implies that you have a mental image of > what it is that you'd like to see on your negative/positive. You see, pre-visualization is something a professional photographer has to use in order to get what is wanted from the picture he is selling. In my professional work, I am selling something that does not exist yet, someone is trusting in my ability in produce it. When I shoot for fun, either pinhole, zone plate or whatever I am doing (I'm getting pretty found of old cameras w.o. a light meter), I am trying more and more to be like a random shooter. I really want the images I get to surprise me. I have a primary intention when pointing the camera to something, but leave a very broad possibilities for what might come from that. Maybe I'm just tired of the commercial work :) Cheers Joao
[pinhole-discussion] New Images
Hi folks, I changed my page a little. The address is: http://www.geocities.com/Paris/Rue/4414/zp/zpenglish.htm I'm not sure if everything is working properly, I hope it is. If you care to take a look I'll be pleased. If something doesn't work, please let me know and I'll try to fix it. I am including some pinhole too, not only zone plates. Cheers Joao
Re: [pinhole-discussion] Blind photographer
Hi Guy, Thanks for the site. Bavcar made an exhibit here in Brazil a few months back, a friend talked to him a lot and he explained that he can photograph people by talking to them, so he can figure out where to point his camera to in order to frame the subject. It's hard to believe that someone blind can make such beautiful pictures. He mentioned that to make a good picture, the photographer must go a bit blind too, so his work is not at all disassociate to pinhole and zone plate isn't it? Aren't we going a bit blind when shooting the way we do? Just a though. Cheers Joao Guy Glorieux wrote: > Hi all, > > I was prompted from a query on an another photo list to do a bit of > research about a blind photographer I had seen an exbition of, some time > ago, here in Montreal. > > I thought I would share this with you also, even if this is not pinhole. > > The photographer is Evgen Bavcar. Born in Slovenia in 1946, he now > lives in France. He began to lose his sight at the age of eleven and > started to do photography then. He works with an assistant and does > outstanding work. He holds a PhD in Aesthetics Philisophy. He has also > writen several books and lectures in Europe. > > He has an excellent web site on Zone Zero at > http://www.zonezero.com/exposiciones/fotografos/bavcar/ > > Hope you enjoy. > > Guy > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] SX 70
Hi Guillermo, Thanks for the links, very useful information there. I hope I can fix it, I really like the camera. Joao Guillermo wrote: > - Original Message - > From: "Joao Ribeiro" > > > My SX 70 just broke, the film is not coming out. > > I know there are people here that use SX 70 for pinholes, so maybe some > > one knows how to fix it. I don't have anyone here in Brazil that is able > > to do that, so I'll have to manage to do it myself. > > Thanks in advance for any clues, > > Joao, > I think you could use the SX-70 repair book Ed Rommey sells: > http://www.edromney.com/ > check this site also: > http://www.chemie.unibas.ch/~holder/SX70.html > it has very good info on SX-70, including a section on disassembly. > > In case you are not aware, you could use Time Zero SX-70 Film in any Polaroid > camera that takes 600 film, check this article: > http://www.polaroidwork.com/articles/article4.jsp > A friend of mine that is heavily involved in SX-70 manipulations, use to go > through 3 or 4 SX-70 cameras each year, now that SX-70 are becoming too > expensive (and scarce in some areas), he buys OneStep cameras instead. > SX-70 have better optics than OneStep cameras, but if your aim is to do > emulsion manipulation, optics quality should not matter. Anyway, that is an > alternative if your SX-70 can't be revived. > > Guillermo > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] SX 70
Hi Andy, Do you happen to have his email address? Thanks Joao Andy Schmitt wrote: > eric nelson has done some serious work modifying SX-70's maybe he can make a > recommendation or 2... > good luck > andy > > -Original Message- > From: pinhole-discussion-admin@p at ??? > [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Guillermo > Sent: Tuesday, August 07, 2001 9:12 PM > To: pinhole-discussion@p at ??? > Subject: Re: [pinhole-discussion] SX 70 > > - Original Message - > From: "Joao Ribeiro" > > > My SX 70 just broke, the film is not coming out. > > I know there are people here that use SX 70 for pinholes, so maybe some > > one knows how to fix it. I don't have anyone here in Brazil that is able > > to do that, so I'll have to manage to do it myself. > > Thanks in advance for any clues, > > Joao, > I think you could use the SX-70 repair book Ed Rommey sells: > http://www.edromney.com/ > check this site also: > http://www.chemie.unibas.ch/~holder/SX70.html > it has very good info on SX-70, including a section on disassembly. > > In case you are not aware, you could use Time Zero SX-70 Film in any > Polaroid camera that takes 600 film, check this article: > http://www.polaroidwork.com/articles/article4.jsp > A friend of mine that is heavily involved in SX-70 manipulations, use to go > through 3 or 4 SX-70 cameras each year, now that SX-70 are becoming too > expensive (and scarce in some areas), he buys OneStep cameras instead. > SX-70 have better optics than OneStep cameras, but if your aim is to do > emulsion manipulation, optics quality should not matter. Anyway, that is an > alternative if your SX-70 can't be revived. > > Guillermo > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/ > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
[pinhole-discussion] SX 70
Hi folks, My SX 70 just broke, the film is not coming out. I know there are people here that use SX 70 for pinholes, so maybe some one knows how to fix it. I don't have anyone here in Brazil that is able to do that, so I'll have to manage to do it myself. Thanks in advance for any clues, Joao
Re: [pinhole-discussion] push processing b/w film
Hi Murray, Someone posted a while back in alt-photo-list some instructions for developing chromes in BW developers. I gave it a try and it really works, I didn't like the results for ZP, but they work grat for lens photo and PH. Here is what I'm doing: Film Provia Rated iso: 1250 (if you want better shadow details try iso 800) water bath for 3 minutes at 26oC develop in D-76 at 26oC for 16 min, continuos agitation the first 30 sec and after that 5 sec each 30. Stop and fix the usual way. wash for 20 min (the negatives will be very dark, almost unprintable. Bleach in a regular sepia toner bleach wash another 20 min dry (DO NOT USE PHOTO FLO) take the film to you local lab and have the film redeveloped in C-41 (that's the dificult part, they will tell you the film is already developed, so you'll have to insist) The result will be a negative with huge grain and strong colors. Have fun Joao Murray wrote: > Anyone experimented with push-processing b/w film to higher ISO speeds, for > faster shutter speeds? This may be uninportant for users of big box cameras, > because they're not very mobile, but for the handheld pinhole camera this > might open up a wider range of photo subjects that don't have to be > stationary. > > Murray > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Help Me Pick A Color Film
Hi Derek, I used to use Fuji NPL but not for pinhole. If I remember well, the S stands for "short" exposures, like using flash lights or under daylight (not that daylight necessarily means short, specially to us) , and the "L" stands for "long" exposures, when working with tungsten illumination. The color shift, I believe, could be corrected during printing even if you decide to work under daylight. If you ever give the NPL a try, I'd love to read about any comparison. Cheers Joao Derek Watkins wrote: > Jeff > > I've been shooting Fuji NPS with great success. Although the maximum > recommended exposure is 5 seconds, I've used it at 1 and 2 minutes with no > problems at all. And I made one early morning shot in October a couple of > years ago where the final exposure worked out at 16 minutes! Colour balance > on the print was fine. > > Hope this helps > > Regards > Derek > > Derek Watkins & Associates > 27 Bray's Lane > Coventry CV2 4DT > > Tel:024 7645 4419 > Fax:024 7645 8989 > Mobile: 077 7893 3094 > > -Original Message- > From: INTERNET:pinhole-discussion@p at ??? > Sent: 02 August 2001 18:52 > To: INTERNET:pinhole-discussion@p at ??? > Subject:[pinhole-discussion] Help Me Pick A Color Film > > > Can anyone suggest a good color negative film for me? > > I will be shooting 4x5 and processing c-41. > > Since it is pinhole we are dealing with, a film with low reciprocity > failure and not to significant color shift when taking long exposures > would be a plus. I am primarily shooting outdoors. > > I have been shooting black and white for a long time, and am > not to up to speed on what color films are notable today... > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] f-stop calculations and reciprocity failure numbers
> > divided by its focal distance at infinity. > > The other way around, actually. Focal distance at infinity divided by the > apparent diameter. I know that is what you meant, but thought to mention it > for clarity sake. > > Guillermo Thanks Guillermo,
Re: [pinhole-discussion] f-stop calculations and reciprocity failure numbers
> Hi folks, > each F stop is the diameter of the opening compared to the > focal length of the lens, focussed at infinity. Each f stop admits twice as > much or half as much light per unit of time as the next F stop above or > below it. F stops are convenient when using a lens, I read somewhere that the f stop is actually the "apparent diameter" of the opening of the lens when viewed by the front side divided by its focal distance at infinity. It is not the real opening diameter. Can anyone comment on that? Thanks Joao
Re: [pinhole-discussion] process partial 120 rolls
Hi Gord, People have answer about the "clip test", I didn't know this was the name in English, translating from Portuguese would be something like "tip test". Usually fashion or portrait photographers do that to assure proper exposure/development as they are not "bracketing". One thing I'd like to ad is that people usually take the hole roll and they randomly cut a piece at the end, usually just enough to assure one complete frame, so you'll sure loose 1 frame (the one next to that cut for the test). The problem I see, if I understood well, is that you'll be cutting the film yourself to load your camera. It would be a good idea to share with the lab manager your ideas and take them the camera, so they can unload your film directly into the machine. Allow extra margins for the hangers. The lab I work with here in Brazil (Fuji Pro) would do it w/o further problems. Good luck. Joao "Gordon J. Holtslander" wrote: > Hi: > > More fiddling with my multihole panoramic camera. I've realized it would > be possible to adapt this camera to take a cut piece of 120 or 220 color > film. Its designed to take a 4x10 sheet of film or pager - but I could > easily put a 10 inch length of color 120 film. Much cheaper than buying > 8x10 color sheet film :) > > I don't process color film - has anyone had experience taking a partial > roll of 120 film to a lab. I would likely have to wrap the film back into > the backing paper and on the reel. > > Would the processing machines be screwed up if the film was shorter that > normal? > > Images at http://cyano.usask.ca/pinhole > > Gord > > - > Gordon J. Holtslander Dept. of Biology > hol...@duke.usask.ca112 Science Place > http://duke.usask.ca/~holtsgUniversity of Saskatchewan > Tel (306) 966-4433 Saskatoon, Saskatchewan > Fax (306) 966-4461 Canada S7N 5E2 > - > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Re: New Zone Plate images - 1 more
Nice picture, but I still think color works better with ZP :) Joao "G.Penate" wrote: > Have one more image to show you, it is titled "Plastic Beauty Pageant" and > have added it here http://members.home.com/penate/ZP120_2.html > > Although originally a color image (from the same roll as "Kathouse", image > #59 at http://www.pinholeday.org/exhibition/ ), using photoshop I turned it > into a B&W to depart of my preconcieved idea that ZonePlate images work best > with color material. > > Guillermo > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] Overexposed negatives
Hi folks, Have you tried the bleach and redevelopment sistem? I believe it might be a better solution, try http://www.qa63.dial.pipex.com/bleachbleach.htm Hope it helps Joao John Yeo wrote: > I've only used it once... to take the stem off a flower against a back > blackground. I started by mixing solution A and B together (according to > the instructions) and couldn't get it to do anything at all. I asked on > usenet, and Richard Knoppow advised to just use solution A alone, then soak > the neg. in fixer after you're done reducing. I had to use quite a few > applications (of solution A) before I even started to see any effect. > > I don't know what it will do to your shadows. Unless somebody who has used > it more offers advice, I would try it on an unimportant neg. from the roll > and see what happens. > > John > > - Original Message - > From: "Guy Glorieux" > To: "Pinhole List" > Sent: Saturday, June 16, 2001 9:05 AM > Subject: [pinhole-discussion] Overexposed negatives > > > Hi all, > > > > I just shot a couple of rolls of 120 B&W film with my pinhole camera and > > they turned out to be massively overexposed (due to my own error). > > > > Any suggested treatment from anybody? I hear that the stuff to use is > > Farmer's Reducer but I've never used it. Does anyone have experience > > with this chemical? Does it remove density uniformely across the > > negative? I guess I'm worried about losing the shadow area before the > > highlights become light enough to be printable. > > > > Thanks in advance. > > > > Guy > > > > > > ___ > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??? > > unsubscribe or change your account at > > http://www.???/discussion/ > > > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
[pinhole-discussion] WPPD very late response
Hi list, Due to some personal problems I have been very late with email reading. I couldn't get involved with the WPPD project and only today I could look at it. It's very late for that but I'd like to congratulate all of you that send pictures, I spent the most delicious hours this morning looking at those pictures. Congratulations to you all although very late. I'm proud to belong to this list. Joao
Re: [pinhole-discussion] New Zone Plate images
Oh! I didn't notice! A pleasant surprise, so I didn't have to wait longer to see new pictures :) I specially liked "among heroes". Cheers Joao "G.Penate" wrote: > - Original Message - > From: "Joao Ribeiro" > > > Hi Guillermo, > > > > Another excellent picture! > > Joao, in case you missed them, there is more than 1 picture, just move your > pointer over the picture's titles at the left side. > http://members.home.com/penate/ZP120_2.html > > Guillermo > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] New Zone Plate images
Hi Guillermo, Another excellent picture! Congratulations again! Joao "G.Penate" wrote: > Care to see some rather "plain" ZonePlate images? > BTW, they were made on WPPD day, but processed until now. > > http://members.home.com/penate/ZP120_2.html > > Guillermo > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.???/discussion/
Re: [pinhole-discussion] OFF topic / Help
Thanks Andy, Actually I think I'll take the ZP, handheld possibility :) Joao Andy Schmitt wrote: > Taking your PH's Hope so > have a great trip > andy > > -Original Message- > From: pinhole-discussion-admin@p at ??? > [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Joao Ribeiro > Sent: Thursday, March 01, 2001 9:04 AM > To: pinhole-discussion@p at ??? > Subject: [pinhole-discussion] OFF topic / Help > > Hi folks, > > Sorry for this off topic email. > I am going to Miami to photograph 2 apartments > > Joao > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.p at ???/discussion/
Re: [pinhole-discussion] OFF topic / Help
Hi Mark, Thanks a lot for the info. I don't know yet about the details of the trip, but I'll shure try to stop by. Send me your phone number, I'll let you know how things are going. Thanks again Joao Mark D Roberts wrote: > Joa: > For supplies (including polaroid), Aperture Pro Supply 1330 18th St Miami > Beach (305)535-6375. > > The best film processing in South Beach, I use them extensively, BWC > Chrome Lab, 233 11th St, Miami Beach. (305)534-4454. > My studio is in the Bakehouse if you can stop by. > > Ciao, > > Mark Roberts > 1-800-610-3576 > > Mark D Roberts > mrobe...@pbfreenet.seflin.lib.fl.us > > On Thu, 1 Mar 2001, Joao Ribeiro wrote: > > > Hi folks, > > > > Sorry for this off topic email. > > I am going to Miami to photograph 2 apartments and I would like to buy > > films there instead of taking them with me from Brazil. Also, I'd like > > to have them developed before coming back. > > Can anyone suggest me a good place to buy professional 120 chrome films > > and a reliable E-6 lab there? > > Please answer off list to > > jribe...@greco.com.br > > > > Thanks in advance > > > > Joao > > > > > > ___ > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??? > > unsubscribe or change your account at > > http://www.p at ???/discussion/ > > > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.p at ???/discussion/
[pinhole-discussion] OFF topic / Help
Hi folks, Sorry for this off topic email. I am going to Miami to photograph 2 apartments and I would like to buy films there instead of taking them with me from Brazil. Also, I'd like to have them developed before coming back. Can anyone suggest me a good place to buy professional 120 chrome films and a reliable E-6 lab there? Please answer off list to jribe...@greco.com.br Thanks in advance Joao
Re: [pinhole-discussion] Zone Plate Image Generator
Hi Larry, Yes, one doubt (probably because English is not my native language) Larry Fratkin wrote: > Basically, the width and the height are MM and tell what size film > you're going to. > > > So, is it the size of the film I intend to output the image with or > the size of the film I will be using in my camera to shoot with the > zone plate I make? > > Thanks for the program and the instructions > > Joao
Re: [pinhole-discussion] Recommended Exposures onto Paper
Hi, Someone once told me that the ISO P, the one we find with the paper instructions, is 1/100 of the film ISO. So, using the Ilford paper as an example, w/o. filter the paper is ISO P 500 giving us aprox. ISO 5 for film meters. Using filters for multicontrast, the ISO P might be 200 or 100 thus giving us a meter setting of ISO 2 or 1. If it is true, well I haven't tested yet, but if someone did, I'd love to hear. Joao > I would use iso 6 for most papers.I would also recomend rc for the > negative. > >
Re: [pinhole-discussion] ZP image
Hi Guillermo, Well, here summer officially started today, Dec. 21st at 11:30. It promises temperatures well above 35 o C and lots of rain. Cheers Joao "G.Penate" wrote: > - Original Message ----- > From: "Joao Ribeiro" > > > Oh, Joao, since you're from Brazil, you might also enjoy the following > reference > > > from the same source: > > > "A Use for that Last Cup of Coffee: Film and Paper Development " or how > to process > > > your prints in coffee! > > > http://www.rit.edu/~andpph/text-coffee.html > > > I saw this article but never gave it a try. I wouldn't develop my films > with it but > > paper prints, why not? > > I've been using coffee as a toner for a while now, > > Oh, a very hot and comforting "cafezinho" from Brazil is what I need to > "tone" the gray days we are having here in the east of Canada. Winter just > started officially this morning, but we have couple of very snowy weeks, so > far. > > Guillermo > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.p at ???/discussion/
Re: [pinhole-discussion] Scanning Color Zone Plate Negatives
Hi Tom, I can't help you with large format, all the zp work I do is 35 mm, and I am using a Nikon coolscan III, it works great, never had any problem. Joao Tom Miller wrote: > Dear Gang, > > Does anyone on the list have experience scanning color zone plate > negatives? > > Despite 19 years in the computer trade, I have no experience with > photographic scanners, Photoshop, etc. After doing some research, it > looked like the the Umax Power Look 1100 would be the best combination > of features and price for my use. One of the things I hoped to do was > scan color negatives to produce quick proofs and eventually finished > prints. I took a couple of 4x5 zone plate color negatives (Kodak) to > the local photo store to see how the scanner would handle then. One > of the store's digital imaging folks spent an hour trying to scan the > negs with no success, or more precisely the scans didn't produce > images that looked anything like the prints I made using standard > enlarger / chemical processes. His guess was that the zone plate > negatives were just too wacky for the scanner; the density was poor > compared to what the scanner is used to dealing with. Scanning 4x5 > color negs taken with a lens camera worked great. Darn, I was looking > forward to taking the plunge into digital. Also, the store is > arguably the best one locally for working with professional > photographers, so I don't think this was a case of operator error. > > Any ideas? Would a dedicated large format negative scanner have > worked better that the flatbed scanner (for a similar price)? Would > another brand of flatbed scanner work any better? Or is the default > option of waiting for the price to drop and the quality to go up the > only viable one? > > Thanks, > Tom > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.p at ???/discussion/
Re: [pinhole-discussion] Coffee developer - Picture uploaded
Hi Guy, I loved the picture! I'll try coffee developer soon in the future. I understood that the print was developed in coffee isn't it? Was the negative too? Thanks Joao > The picture can be seen at: > http://www.p at ???/discussion/upload/images/pose_cafe.jpg
Re: [pinhole-discussion] New Images
Hi Guillermo, Thanks, I'll try to make some PH during X-mas, I wonder what we can get with the lights Cheers Joao G.Penate wrote: > Moito belho, Joao!! > > There are probably Brazilian photographers that produce images like Pele, > Tostao and Carlos Alberto, but your ZP and PH are like Ribellino: "cousa > mais linda". > > Keep showing us your stuff, please. > > Guillermo > > ----- Original Message - > From: "Joao Ribeiro" > To: > Sent: Monday, December 11, 2000 11:55 AM > Subject: [pinhole-discussion] New Images > > > Hi folks, > > > > I never uploaded any images in the site, so I decided to contribute with > > some. > > > > http://www.p at ???/discussion/upload/images/zp_mulher.jpg > > http://www.p at ???/discussion/upload/images/zp_poste03.jpg > > http://www.p at ???/discussion/upload/images/zp_rio01.jpg > > http://www.p at ???/discussion/upload/images/ph_venus.jpg > > > > The last one is a pinhole picture printed with the bromoil technique, > > the others are zone plates. > > > > I hope you like them > > > > Joao > > > > > > ___ > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??? > > unsubscribe or change your account at > > http://www.p at ???/discussion/ > > ___ > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??? > unsubscribe or change your account at > http://www.p at ???/discussion/
Re: [pinhole-discussion] New Images
Hi Andy, Thanks Andy Schmitt wrote: > muy bueno...simply stunning!! > andy
Re: [pinhole-discussion] New Images
Hi Gregg and Erich, I'm glad you liked them. Cheers Joao
Re: [pinhole-discussion] New Images
Hi Guy, > Venus is a beauty! I like the way she comes out of darkness. The grainy > texture adds a lot to the erie feeling. Does the high grain come from the > bromoil process? Very nice, Joao. > Best, > Thanks.The bromoil process let me render the image the way I want it, with or without grain, and in whatever color I want, since it is formed by ink and not by silver. Joao
Re: [pinhole-discussion] New Images
Hi Andy, > rios cool but I really like zp_mulher.jpg...btw what is it? Mulher means woman in Portuguese.It is a marble sculpture.I lighted it with a 1000 w Par 64 lamp. I'm glad you liked it. Joao
Re: [pinhole-discussion] ZP image
Guy Glorieux wrote: > Not at present. She looks at me on the computer and the internet and says: > "not > for me"... Of the two of us, I'm sure she is the wisest! Oh, the time wasted > on > the internet or fixing faulty systems on the computer... -:)) She is probably right! > How would this work? Digital IR, this is the first time I hear about this. > How > exactly do you set the camera to cut down on the precise frequency of IR? Or > do > you just use a full IR filter? Are the light cells sensitive to IR? Hmmm! > I have > a friend who would want to know all about this area! Actually it isn't my idea, check this site: I just use an IR filter and some speed adjustments in the camera, pretty easy :) > Oh, Joao, since you're from Brazil, you might also enjoy the following > reference > from the same source: > "A Use for that Last Cup of Coffee: Film and Paper Development " or how to > process > your prints in coffee! > http://www.rit.edu/~andpph/text-coffee.html > > I've tried it and it works. Very long processing times but interesting > "sepia-tone"-type of results. Looks like very ancient photographs... I saw this article but never gave it a try. I wouldn't develop my films with it but paper prints, why not? I've been using coffee as a toner for a while now, I do bromoils and they look great when coffee toned, the paper base becomes warmer in color. Now that you mentioned, it might work with lith films as well. Cheers Joao
[pinhole-discussion] New Images
Hi folks, I never uploaded any images in the site, so I decided to contribute with some. http://www.p at ???/discussion/upload/images/zp_mulher.jpg http://www.p at ???/discussion/upload/images/zp_poste03.jpg http://www.p at ???/discussion/upload/images/zp_rio01.jpg http://www.p at ???/discussion/upload/images/ph_venus.jpg The last one is a pinhole picture printed with the bromoil technique, the others are zone plates. I hope you like them Joao
Re: [pinhole-discussion] ZP image
C,a va' Guy, > By contrast, my spouse is a B&W person and she has turned into a ZP addict, > producing effects quite similar to infra-red. Which naturally led her to > test IR film with ZP. But then the combination of the two was too > contrasty, so she's doing either ZP or IR. I always wanted to know how IR ZP would look like. Does she have a web site?IR films are prohibited here in Brazil (don't ask me why) so the best I can do now is digital IR with my nikon 950. Maybe in the future I'll convert it to ZP. > P.S. I wonder how many people on the list do ZP together with PH. Is there > a ZP Vision group?The two are both very close and yet very distant apart > from an esthetic perspective, at least in my humble opinion. I do both, but mainly ZP as I have it installed on a 35 mm camera, so it is always with me and in bright days I can handheld the camera. Best Regards Joao
Re: [pinhole-discussion] ZP image
Hi Guillermo, This one is even more interesting! I was yet to see a zp b&w photo that I really liked. I think zp works better with color. I don't usually dislike bw zp, but I think it looses much of its power. But this one is really great. Joao > Here is another zoneplate image taken with the same camera: > http://www.p at ???/discussion/upload/images/sirwinston.jpg > > Guillermo
Re: [pinhole-discussion] ZP image
Hi Guillermo, Very nice picture!! Looks pretty much like a night shot. I'm glad you're back Joao
