Re: [pinhole-discussion] going in circles

2003-04-18 Thread John Yeo
So who's going to be the first one to make a camera out of the altoid strips cans? John - Original Message - From: "Marcy Merrill" To: Sent: Thursday, April 17, 2003 11:19 AM Subject: [pinhole-discussion] going in circles > Here's a question for you buncha geniuses. > With my deadlin

Re: [pinhole-discussion] new to list/pinhole photography

2003-04-14 Thread John Yeo
Are you sure you diluted your chemicals correctly? What chemicals are you using? If the smell is so strong you can't stand to be in the room, there's probably a problem. John - Original Message - From: "Rauch, Shelley" To: Sent: Monday, April 14, 2003 7:12 AM Subject: FW: [pinhole-dis

Re: [pinhole-discussion] Pinhole goodies on ebay.

2003-03-23 Thread John Yeo
If you have a rubber eye cap, you can usually see a faint image through the viewfinder depending on the brightness of the scene. John - Original Message - From: "Jeff" To: Sent: Sunday, March 23, 2003 4:04 PM Subject: Re: [pinhole-discussion] Pinhole goodies on ebay. > I guess when th

Re: [pinhole-discussion] Can't open D'Arcy Powers article

2003-02-21 Thread John Yeo
That's not supposed to happen... there's something wrong with your computer. Thanks for posting this nick, I got the photocopy from John Ptak, but the PDF is also handy to have. John . - Original Message - From: To: Sent: Friday, February 21, 2003 5:34 PM Subject: Re: [pinhole-discussio

Re: [pinhole-discussion] D'Arcy Power article on-line

2003-02-21 Thread John Yeo
Try going to http://idea.uwosh.edu/nick/pinholephoto.htm and finding the link there. Then right click on it, and click on "save target as." That will save it to your hard drive, and you should be able to open it with acrobat reader from there. John - Original Message - From: "Bill Ericks

Re: [pinhole-discussion] New photo show

2003-02-04 Thread John Yeo
I can second the kallitype recommendation. I just did my first kallitype last week. Check it out a http://www.enteric.org/sa/kallitype-small.jpg (not pinhole). I printed a few under the sun, but was having problems with bleaching during development due to an overly strong fixer. This one was ex

Re: [pinhole-discussion] Developing paper negatives.

2003-02-01 Thread John Yeo
Cooltone and MG paper developer works fine. You will be waiting a looonggg time for the paper to develop in film developer unless you use insanely concentrated stuff. John - Original Message - From: "Bob Arnott" To: "Pinhole Discussion" Sent: Saturday, February 01, 2003 10:10 AM Subjec

Re: [pinhole-discussion] What is a "silver print" really?

2003-01-24 Thread John Yeo
The albumen and kallitype processes use silver nitrate, but aren't referred to as silver prints. John > If the process uses silver, then it is a silver print. I can't think of any > exceptions. > > Cheers - > > george > > = > Handmade Photographic Images - http://GLSmyth.com > DRiP Investing

Re: [pinhole-discussion] not pinhole ... but !

2003-01-17 Thread John Yeo
I spoke too soon... http://medfmt.8k.com/mf/sphere.html John -- www.enteric.org - Original Message - From: "Jason Russell" To: Sent: Friday, January 17, 2003 9:14 AM Subject: Re: [pinhole-discussion] not pinhole ... but ! > In a couple shots it looks like you can see a rod going up to

Re: [pinhole-discussion] not pinhole ... but !

2003-01-17 Thread John Yeo
I remember seeing a home-made one on robert monaghan's website http://medfmt.8k.com/mf/index.html I don't have the link to the exact page... John -- www.enteric.org - Original Message - From: "Jason Russell" To: Sent: Friday, January 17, 2003 9:14 AM Subject: Re: [pinhole-discussion]

Re: [pinhole-discussion] 1905 ph work

2003-01-14 Thread John Yeo
John, I would appreciate a copy. I tried emailing you directly, but it bounced back. I'll send off an 8x10 SASE with a few dollars to cover reproduction costs. Thanks, John Yeo -- http://www.enteric.org - Original Message - From: "John F. Ptak" <3legskil...@thescienc

Re: Re[3]: [pinhole-discussion] (no subject)

2002-12-13 Thread John Yeo
About a month ago, I asked if we were going to do it again, but nobody seemed interested. Regarding the new swap, I think that the limited time betwen now and the holidays would discourage participation, so maybe the suggested final mailing date should be bumped to the end of january. John -

Re: [pinhole-discussion] What is Diffraction?

2002-12-11 Thread John Yeo
> a glass of water with a straw inside is a simple example. > you see the straw bent but it is not. > thats what happen with light when it changes the medium it is travelling > (from air to water or through the glass, example). I am not sure about > what happens with pinhole, once there is no medi

Re: [pinhole-discussion] Zone plates for a body cap

2002-10-24 Thread John Yeo
Does the pentax K body cap lock into the bayonet mount? The one I have is just a pressure fit, and I am afraid it would come off really easily or leak light. John - Original Message - From: "Beaker" To: Sent: Thursday, October 24, 2002 6:39 PM Subject: [pinhole-discussion] Zone plates

Re: [pinhole-discussion] pinhole portfolio

2002-10-23 Thread John Yeo
The best way to obtain a number of pinhole images is through a printswap... but I doubt there will be a printswap before january. John - Original Message - From: "Gordon J. Holtslander" To: Sent: Tuesday, October 22, 2002 7:54 PM Subject: [pinhole-discussion] pinhole portfolio > Hi: >

[pinhole-discussion] Keeping your images away from the evil robots!

2002-08-02 Thread John Yeo
This is a little off topic, as it doesn't relate directly to pinhole, but many members of this list have websites exhibiting their work, so I decided to put it out there. I have recently noticed a few requests every day on my webserver for "robots.txt". After getting that file (which doesn't even

Re: [pinhole-discussion] nail hole camera

2002-07-28 Thread John Yeo
> That's an f 2105, about 14 stops larger then f16. 14 stops is 16384 > times exposure. If you needed 1 second at f 16 you would need to expose > for about 4.5 hours at f 2105. Hope you have a good tripod for that tube. But if he's using 400 ASA film, that's only 40 sec as the BDE exposure, ex

Re: [pinhole-discussion] HP5, Delta films and reciprocity

2002-07-21 Thread John Yeo
0, 2002 10:12 PM Subject: Re: [pinhole-discussion] HP5, Delta films and reciprocity > on 20/7/02 12:11 pm, John Yeo at jonn...@thegrid.net wrote: > > I use the formula, y=.91x^1.51, where x is the metered time and y is the > corrected time. It approximates the reciprocity pretty clo

Re: [pinhole-discussion] HP5, Delta films and reciprocity

2002-07-20 Thread John Yeo
I used a graphing calculator. John > What do you call this sort of shareware and how would you find it on the > internet?

Re: [pinhole-discussion] HP5, Delta films and reciprocity

2002-07-20 Thread John Yeo
I use the formula, y=.91x^1.51, where x is the metered time and y is the corrected time. It approximates the reciprocity pretty closely, and has worked for me for exposures up to 2 hours on FP4+, which shares the same reciprocity failure as HP5+. I've always processed normally, with pmk pyro.

Re: [pinhole-discussion] re: paper negative

2002-06-25 Thread John Yeo
That was my experience, no logo on the final print. When replying to such a long long thread, please delete the 3262354 irrelevant messages, yahoo sigs, and the tags that the list puts from your post. Just leave the one that you are specifically replying to. I have scrolled through many of the m

Re: [pinhole-discussion] tube development

2002-06-02 Thread John Yeo
The inside edges of the tube have to be very polished. I have had many a tube that have felt smooth, but have scratched my film. The best way to get around it is to keep sanding the edges with finer and finer sand paper, and finally finish it off with steel wool. You could also try puttin your f

Re: [pinhole-discussion] best viewfinders for close-up work

2002-04-19 Thread John Yeo
Wow! thanks for the compliment Guillermo. Sarah, if you want a description of how I made it, see http://www.enteric.org/810/index.html Because it's a pinhole camera, and focus is not an issue, you can always use felt or weather stripping where the film holder sits to seal out any light. - O

Re: [pinhole-discussion] Film Development

2002-04-17 Thread John Yeo
I believe richard already said that he was referring to the area of the exposed image, because it is the only part that exhausts developer. The original question related to how much developer would be used in the development process. Yes. there may be 47880mm^2 of surface area (actually less, bec

Re: [pinhole-discussion] Re: Exposure scale

2002-03-27 Thread John Yeo
You can always convert it to a .pdf file using a program called Pstill. Get it at http://download.cnet.com/downloads/0-10074-100-1628951.html?tag=st.dl.10001- 103-1.lst-7-4.1628951 If the url is broken, COPY AND PASTE IT TOGETHER! Rob - you might want to put up the .pdf version. John > I

Re: [pinhole-discussion] umm (ortho-litho development)

2002-03-04 Thread John Yeo
> I use LC-1 and ortho film too. Its very good. However it is slow. An ASA of 1. I've used a > 12 X 18 camera. It ended up having an f stop in the range 0f 300. This translates to an > exposure of an hour on a bright sunny day for one picture. How does that work? For a sunny day exposure wit

Re: [pinhole-discussion] `wrap around` 6x6 pinhole cylinder

2002-02-03 Thread John Yeo
Just thought of something else... a 3" long threaded plastic pipe nipple would work also. You can get caps that screw onto the end, and you would have a choice of diameters to choose from. John - Original Message - From: kathryn VAUGHAN To: pinhole-discussion@p at ??? Sen

Re: [pinhole-discussion] `wrap around` 6x6 pinhole cylinder

2002-02-02 Thread John Yeo
You can make one out of two 35mm canisters. Cut the bottom out of one of them (A dremel tool works really well), and shove it into the top of another with a bit of glue. The circumfrence of the inside would be about 9cm, so it won't be totally wrap around, but it will give you some room to put

Re: [pinhole-discussion] Developing sheet film (a little late)

2002-02-02 Thread John Yeo
y 02, 2002 1:47 PM Subject: Re: [pinhole-discussion] Developing sheet film (a little late) > Hey John, > > I just want to make sure I get it.. you are dipping the stack of > glued-together tubes into the tanks? how do you agitate it? > > rob > > > From: "J

[pinhole-discussion] Developing sheet film (a little late)

2002-02-01 Thread John Yeo
I know the thread on developing sheet film is a little old, but I just thought I would throw this in. As I mentioned before, tubes are my preferred way of developing, but they are limited to as many tubes as you can juggle at a time. I just made a new system, by gluing nine tubes together. I was

Re: [pinhole-discussion] sheet film

2002-01-22 Thread John Yeo
I strongly recommend tubes. Very cheap to make, don't have to be used in complete darkness, and pretty much impossible to scratch the film (which can be a problem with trays). See http://people.smu.edu/rmonagha/brontube.html for how to make a light trap for them. If you don't want to go through

Re: [pinhole-discussion] transparency film...xray duplication film

2002-01-18 Thread John Yeo
Although it is a positive film, wouldn't that mean it is designed to be used with a reversal process? If you developed it in a regular film or paper developer, you would get a negative. John - Original Message - From: "Murray" To: Sent: Friday, January 18, 2002 8:11 AM Subject: [pin

Re: [pinhole-discussion] developing tank pinhole camera?

2002-01-06 Thread John Yeo
Light traps are pretty easy to make. I used these instructions to make light traps for my developing tubes for 4x5 sheet film. I only used two pieces of rubber (instead of the three in the instructions), and have not had a problem with light leaking. http://people.smu.edu/rmonagha/brontube.html

Re: [pinhole-discussion] focusing loupe and focusing cloth

2002-01-04 Thread John Yeo
Because of the number of people interested, and the apparent file size, you might want to just put them on a webserver. Find a free web host, and put the files there for people to download. There won't be any problems with people's email servers freaking out from the file size, nor will people on

[pinhole-discussion] DO NOT OPEN STEVE FOOTE'S EMAIL - VIRUS

2001-12-30 Thread John Yeo
There is a virus in steve foot's message with the subject "Re: Re: [pinhole-discussion] 8x10 Macro Pinhole"

Re: [pinhole-discussion] How to get sheet film OUT of film holder

2001-12-29 Thread John Yeo
You can slide an index card under the film and curl the card up towards the film on the edges. It should make enough room in the middle of the film to get your finger under it. John - Original Message - From: "Murray" To: Sent: Saturday, December 29, 2001 8:23 AM Subject: [pinhole-dis

[pinhole-discussion] camera obscura

2001-12-06 Thread John Yeo
While looking for info on the San Francisco camera obscura (which I will be visiting in january), I came across this page. http://www.cs-photo.com/CO/CO.html Thought it may be of interest to the list. John

Re: [pinhole-discussion] Bellows factor

2001-12-01 Thread John Yeo
> There is no "rule of thumb", just plain physics of light. > This case is in no way different than if you were using a glass lens. I guess you could say the rule of thumb is to add 2 stops every time you double the focal lenngth. You can think of it this way... If you have a 50mm lens at f/16, d

Re: [pinhole-discussion] Re: Bellows factor

2001-12-01 Thread John Yeo
I don't remember guillermo explaining it, so here's my shot at it. Every time the bellows extension is doubled, you have to increase exposure by 2 stops. If you extend the bellows by a factor of 1.414 (the square root of 2), you must double the exposure. so... sqr(2)^x = extension factor. x i

Re: [pinhole-discussion] Re: translation GORDY EMERY

2001-11-28 Thread John Yeo
I work in a drug store, and although we don't stock it, the pharmacist can special order just about anything for you. He regularly orders stuff like halfprin, denatured alcohol, etc for customers. I imagine camphorated oil wouldn't be a problem, if it used to be a regular pharmacy item. John >

Re: [pinhole-discussion] digital pinhole cameras

2001-11-04 Thread John Yeo
Somebody posted this url to the list a while ago. She said it was done with a canon D30 and a body cap. http://www.meggould.net/. Or more specifically http://www.meggould.net/pages/pin1.html John - Original Message - From: "Guy Glorieux" To: Sent: Sunday, November 04, 2001 4:48 AM Sub

Re: [pinhole-discussion] Cheapie Pinholes, from Russia with love

2001-11-01 Thread John Yeo
I had one of those (lomo from freestyle) in my backpack for a while... and the lens somehow unscrewed itself from the shutter! I guess there was a set screw to keep it from unscrewing, but somehow it did. If you want to take the lens off without having to mess with the rest of the camera, you cou

Re: [pinhole-discussion] f stops

2001-10-30 Thread John Yeo
> So, the ratio between the diameters of consecutive stops is the square root > of two. Because in the F/stop formula, the diameter of the opening is in > the denominator, the actual f number increases by a factor of two, as the > diameter decreases by a factor of two. oops. factor of the square

Re: [pinhole-discussion] f stops

2001-10-30 Thread John Yeo
Each successive stop is half the area of the previous stop, and therefore lets half as much light in. We know the area of a circle is 2*pi*r(squared). A = pi * R1(squared)A/2= pi * R2(squared) known A = 2 * pi * R2(squared) multiply by 2

Re: [pinhole-discussion] New very slow film

2001-10-28 Thread John Yeo
Wow, that is an interesting film. The 1000x enlargement was quite impressive. You can see the hands on the watch of a lady sitting far away, on top of a building!. John - Original Message - From: "Jean Daubas" To: Sent: Saturday, October 27, 2001 3:41 PM Subject: [pinhole-discussion]

Re: [pinhole-discussion] Micro or macro photo with pinhole photo

2001-10-27 Thread John Yeo
>That it is... I want to do closeups with a short sharpness area . So you want a small depth of field? You're out of luck with pinhole. Everything will be equally sharp... or unsharp.

Re: [pinhole-discussion] re: 116 film

2001-10-22 Thread John Yeo
A 116 spool is not the same size as a 120 spool. Here is a size comparison Length of the spool: 116 - 2.856" - 72.5mm 120 - 2.580" - 65.5mm Width of the part where the film is wound 116 - 2.814" - 71.4mm 120 - 2.5" - 65.3mm Diameter of the end of the spool 116 - 1.25" - 31.7mm 120 - .95" - 21.4

Re: [pinhole-discussion] salted paper

2001-10-16 Thread John Yeo
Could you check that url? I get a dns error, and would really like to see the book. > One of the best references is James Reilly's book The Albumen & Salted > Paper Book. This is out of print. Fortunately it has recently been put > online at http://albumen.stanford.edu/library/monographs/reilly

Re: [pinhole-discussion] what do i do with 4x5 film negatives

2001-09-23 Thread John Yeo
> I am building a wooden camera that will take 4x5 film backs. I was planning > on just loading the film backs with 4x5 pieces of RC paper. If I were to > load it with 4x5 sheets of FILM instead, what can I do with the film > negative once I've exposed and developed it? Can I still only contact

Re: [pinhole-discussion] compensating zone plate

2001-08-22 Thread John Yeo
> Also, I've long wondered why no one makes zone plates > by etching and staining glass. Every zone plate I've > seen has dirty, scratched, cloudy clear zones because > it's been made on film base. Wouldn't glass be better? > Could probably be done using photoetching. Maybe too > complicated, proba

Re: [pinhole-discussion] Safelight alternatives

2001-07-13 Thread John Yeo
Plastic tubes filled with some kind of chemical. There is a smaller glass tube inside the plastic tube filled with another chemical. When you flex the plastic tube, and break the glass one, the two chemicals react and put out light. You can get them in various colors, red, orange, green, blue an

Re: [pinhole-discussion] body cap SLR conversions

2001-07-13 Thread John Yeo
> Can one see thru the prism/viewfinder on an SLR with a pinhole drilled > body cap? > > Does one need to cover the eyepiece on an SLR conversion to prevent > stray light entering thru the eyepiece? I tried it on my canon ae-1. Without the rubber eypiece, it was really hard to see anything. With

Re: [pinhole-discussion] New member comments for list message handling and a question

2001-07-12 Thread John Yeo
Good suggestions, I'm sure most people feel the same way. The html point has been brought up many many times, but few people ever seem to change it. > (Almost) lastly, so my message has some pinhole-related content, I am > reading pinhole theory and looking at different camera results in > antici

Re: [pinhole-discussion] Re: Hello

2001-07-02 Thread John Yeo
Household goop, from the makers of shoe goo glues pretty much anything together.. plastic, ceramic, metal, paper, etc.It's in the glue section of the hardware store here. John - Original Message - From: "Johanna Zamora" To: Sent: Sunday, July 01, 2001 9:06 PM Subject: Re: [pinhole-di

Re: [pinhole-discussion] take me off.

2001-06-30 Thread John Yeo
Lindsay, follow the instructions at the bottom of every email. > unsubscribe or change your account at > http://www.???/discussion/ p.s. nice last name :P - Original Message - From: "lindsey yeo" To: Sent: Friday, June 29, 2001 10:42 PM Subject: [pinhole-discussion] take me off.

Re: [pinhole-discussion] best paint to use for tins

2001-06-27 Thread John Yeo
And a coat of metal primer after sanding and before the black paint wouldn't hurt either. It is made to stick well to metal, and other paints stick to it. John - Original Message - From: "G.Penate" To: Sent: Wednesday, June 27, 2001 9:35 AM Subject: Re: [pinhole-discussion] best paint t

Re: [pinhole-discussion] Pintoids

2001-06-26 Thread John Yeo
John - Original Message - From: "Marcy Merrill" To: Sent: Tuesday, June 26, 2001 5:09 AM Subject: Re: [pinhole-discussion] Pintoids > John Yeo wrote: > > I played around with altoid boxes a while ago with paper negatives. The > > wide angle is fun. I had trouble

Re: [pinhole-discussion] Pintoids

2001-06-25 Thread John Yeo
Wow, I really like the last one on the page, with her dress flowing in the wind. Which pintoid was that with? I played around with altoid boxes a while ago with paper negatives. The wide angle is fun. I had trouble figuring out how to keep them still. I usually ended up holding them hard agains

Re: [pinhole-discussion] Remember that pinhole swap...

2001-06-24 Thread John Yeo
I got all of them on list 3 John - Original Message - From: "Jeremy Siemens" To: Sent: Friday, June 22, 2001 3:47 PM Subject: [pinhole-discussion] Remember that pinhole swap... > Just wondering... what is the average return rate for > a pinhole swap group? For example, if 20 people

Re: [pinhole-discussion] 8x10 Macro Pinhole

2001-06-24 Thread John Yeo
Correct, but it still wouldn't give a wide angle perspective. John - Original Message - From: "M" To: Sent: Sunday, June 24, 2001 11:14 AM Subject: Re: [pinhole-discussion] 8x10 Macro Pinhole > >> I want to build an 8x10 pinhole for doing abstract macro photography. I > >> was thinking

Re: [pinhole-discussion] Reciprocity Problem

2001-06-24 Thread John Yeo
400. The reciprocity failure for 400 is worse than 100. You really can't get much of an equation from three points. Hope this helps, John Yeo > - Forwarded message -- > From: Ballard Borich > To: pinhole-discussion@p at ??? > Date: Thu, 21 Jun 2001 10:2

Re: [pinhole-discussion] 8x10 Macro Pinhole

2001-06-24 Thread John Yeo
You wouldn't need more bellows extension, as a pinhole does not need to be focused like a lens. 300mm is a standard focal length, not wide angle nor telephoto. You could figure out how large the image would be on the film by using simmilar triangles. I believe the optimal pinhole for a 12" focal

Re: [pinhole-discussion] pinhole exposures

2001-06-23 Thread John Yeo
This makes perfect sense in my head, but it may not make sense written out. I used this method when i was first starting out with paper negatives and cardboard box cameras. It really helped to have a photo teacher who gave me a really good understanding of f/ stops. I would do a series of tests t

Re: [pinhole-discussion] Reciprocity Problem

2001-06-19 Thread John Yeo
Most modern graphing calculators can find curves of best fit. I have a TI-83, and would be happy to provide more details on how to do it, or punch in the numbers if you don't have access to one. John - Original Message - From: "Jeff Dilcher" To: Sent: Tuesday, June 19, 2001 8:03 AM Subj

Re: [pinhole-discussion] Overexposed negatives

2001-06-16 Thread John Yeo
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 n

Re: [pinhole-discussion] changes to the "upload" gallery

2001-06-07 Thread John Yeo
Hi Gregg, I like the new format much better. Is it possible to view the filename as well as the image, or have the uploader enter some text about the image? Before, people would name the images with their name, but now you can't see the name and don't know who made it. John - Original Messag

Re: [pinhole-discussion] intro

2001-05-31 Thread John Yeo
Doh! I just re-read your site, and that's what you had posted there. :P >That's neat you drive it with photovoltaic cells. I wonder if > there is any way to base the exposure on how much power the cells are > putting out. Something like figure out how many revolutions it takes to > make a photo

Re: [pinhole-discussion] intro

2001-05-29 Thread John Yeo
Hi Joe, Welcome to the list. Great website. I'm curious about your panoramic camera. Does it make only one rotation, or multiple rotations? From the description, it sounds like it makes multiple revolutions. What is the focal length? That's neat you drive it with photovoltaic cells. I wonder

[pinhole-discussion] Fisheye pinhole??

2001-04-04 Thread John Yeo
Could you explain it to us? Is it just really wide angle, or does he/she somehow manage to get the fisheye distortion? John > I have a friend who is a professional advertising photographer who has a > pinhole camera that is like a fisheye lens.

Re: [pinhole-discussion] Hardware geeks

2001-03-22 Thread John Yeo
I'm (re)taking basic photo in high school because of a schedule conflict... I would say that the majority of the people in the class are just there because it's an easy class to get out of. 10 min into the period, most of the class is out "taking pictures." I don't really mind because it leaves

Re: [pinhole-discussion] f-number

2001-03-14 Thread John Yeo
To get the actual number (not a decimal), divide the focal length by the pinhole diameter. As for exposure, my method is to meter the scene at say f/16 and use equivilant exposure to determine the exposure for the pinhole. Double the time for each stop. Say it's a sunny day with 100asa film,

Re: [pinhole-discussion] panoramic camera

2001-03-13 Thread John Yeo
I though this was the guy who told us about his holga he stretched using the book binding material... i think he promised to post pictures, and these are them. John - Original Message - From: Guy Glorieux To: pinhole-discussion@p at ??? Sent: Tuesday, March 13, 2001 11:2

Re: [pinhole-discussion] New Camera Design

2001-03-12 Thread John Yeo
It says extreme depth of field... and I would think that f/256 with a 2" focal length would be pretty extreme depth of field. I remember seeing this camera once before... maybe somebody posted it to the list? I'm curious if anybody has one. It seems like a lot of money for something that can be

Re: [pinhole-discussion] Re: Pinholes in my pinholes

2001-02-11 Thread John Yeo
I've noticed that with krylon ultra flat black. When I spray and there's lots of excess, it dries before the particles hit the floor, and I end up with a layer of uiltra fine particles on the concrete floor and it's very slippery. John > Your spray color must be very dense and the distance of t

Re: [pinhole-discussion] needle measurer

2001-02-09 Thread John Yeo
Chris, Micrometers measure to 1/10,000 of an inch... I think I've seen them at true-value hardware for around $30. They're probably poor quality though. I have a set of dial calipers that measure to 1/1000 of an inch that I got at the swap meet for $12. I've never had to measure pinhole needles a

Re: [pinhole-discussion] RE: stripped negative

2001-01-20 Thread John Yeo
You might want to check out http://www.bostick-sullivan.com/Technical_papers/paperneg.htm. It has some more info on the topic. John - Original Message - From: "Jerry and Katherine Green-Ellison" To: Sent: Saturday, January 20, 2001 8:53 AM Subject: [pinhole-discussion] RE: stripped n

Re: [pinhole-discussion] 35mm pinhole - questions & observations

2001-01-13 Thread john yeo
> I"D BE NICE IF YOU CAN BLOW UP (8x10 perhaps) ONE OF THE FRAMES, SCAN IT AND > LET US SEE WHAT IT LOOKS LIKE, I'D CERTAINLY BE INTERESTED. Here, I enlarged it to 8x10. http://holgamods.blinkk.net/images/limo.jpg This one was shot 'lomo style' from the waist as I was walking by the bank. This li

Re: [pinhole-discussion] 35mm pinhole - questions & observations

2001-01-12 Thread john yeo
on will overtake the circle of > confusion. Diffraction will add to sun flare. The lines in the frames > seem to extend to the border. Has the film gone through an Xray scanner? > I should have recognized my own town on the pictures but had to look > twice. > Richard Heather > > jo

Re: [pinhole-discussion] 35mm pinhole - questions & observations

2001-01-11 Thread john yeo
That's what I thought at first, but it has never appeared in any of my lens photos with that camera. I just had the bearings on the shutter lubricated about 2 months ago. I guess that doesn't rule it out though... mabye the repair screwed up. I'll see if it appears in the future with that camera

Re: [pinhole-discussion] 35mm pinhole - questions & observations

2001-01-11 Thread john yeo
S, SO I AM > WRITTING IN UPPERCASE TO DIFFERENTIATE THE ANSWER FROM YOUR POSTING. > > > - Original Message - > From: john yeo > > A few days ago I made a pinhole body cap for my canon AE-1. I made the > pinhole as small as I could, it ended up .0065 +/- .0005"

[pinhole-discussion] 35mm pinhole - questions & observations

2001-01-10 Thread john yeo
A few days ago I made a pinhole body cap for my canon AE-1. I made the pinhole as small as I could, it ended up .0065 +/- .0005" f/270. Would using one of the formulas to determine the optimal size work better for such a small focal length? Or does that only apply to longer focal lengths. L

Re: [pinhole-discussion] re: calculating exposure

2000-12-29 Thread John Yeo
; 8 16 3264 > > Larry > > > -Original Message- > From: John Yeo > To: pinhole-discussion@p at ??? > Date: Friday, December 29, 2000 4:16 PM > Subject: Re: [pinhole-discussion] re: calculating exposure > > >

Re: [pinhole-discussion] re: calculating exposure

2000-12-29 Thread John Yeo
I didn't see it there. Where on the page is it? How does one calculate half stops? I tried adding 1/22 and 1/32, then dividing by 2, but i got f/26.07, not 1/27.25 like you got. I would like to make a dial calculator with half stops because most of my cameras have apertures that are not full st

Re: [pinhole-discussion] Zone Plate Image Generator

2000-12-28 Thread John Yeo
sted in seeing the source code to see how you did it. I'm also curious what format you generated. My web host only allows Perl, so I'd have to translate it. Larry -----Original Message- From: John Yeo To: pinhole-discussion@p at ??? Date: Wednesday, Decemb

Re: [pinhole-discussion] Zone Plate Image Generator

2000-12-28 Thread John Yeo
, sometimes you really have to look for the zone plate in the middle of the image. Larry -Original Message- From: John Yeo To: pinhole-discussion@p at ??? Date: Wednesday, December 27, 2000 4:48 PM Subject: Re: [pinhole-discussion] Zone Plate Image Genera

Re: [pinhole-discussion] Zone Plate Image Generator

2000-12-27 Thread John Yeo
Larry, Thanks for making this. I'm sure you have already put a lot of work into it... but i get nothing but a blank bitmap. No rings at all. John - Original Message - From: Larry Fratkin To: pinhole list Sent: Wednesday, December 27, 2006 3:52 PM Subject: [pinhole-discussi

Re: [pinhole-discussion] Coffee developer - Picture uploaded

2000-12-13 Thread John Yeo
I tried developing a print in coffee once. It didn't work at all. I mixed up instant coffee at twice the reccomended dilution, printed a picture and put it in. I didnt' use baking soda, I just assumed it was used to make the soup less acidic. I didn't monitor the pH because it said the best pH

Re: [pinhole-discussion] What to do? What to do?

2000-11-30 Thread John Yeo
http://www.p at ???/discussion/upload/images/divided.jpg - Original Message - From: "Tom Lindsay" To: Sent: Thursday, November 30, 2000 5:48 PM Subject: [pinhole-discussion] What to do? What to do? > Hello All, > > I just uploaded a "slit" image of myself undecided on all these is

[pinhole-discussion] tape

2000-11-21 Thread John Yeo
I know we've already beat this subject to death, but I found a new tape at the hardware store today. It's called "friction tape", and is used among other things, to wrap hockey sticks. It's very sticky, and very flat black. I held it to a flashlight and stretched it, but no light came through. T

Re: [pinhole-discussion] READ THIS ONE- Studio Photography

2000-11-20 Thread John Yeo
Why would reciprocity failure even be a problem? It occurs when there are very long exposure times. I beleive even the slowest flashes on the market are much faster than 1/1000 of a sec, so even if you flashed 100 times, it would still be less than 1/10 of a sec, which is in the reciprocity range

Re: [pinhole-discussion] Scanning Question

2000-11-07 Thread John Yeo
Maybe use a copy stand and a digital camera, if you have access to one. John - Original Message - From: "Chuck Flagg" To: Sent: Monday, November 06, 2000 11:01 PM Subject: [pinhole-discussion] Scanning Question > I have changed ISP's am re-subscribing and thought this a good time to >

RE: [pinhole-discussion] pinhole projection

2000-10-29 Thread John Yeo
Yes, It is very possible. Guillermo Penate has some info about it on his website, http://members.home.net/penate/double.html. John -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Rob Dillard Sent: Sunday, October 2

RE: [pinhole-discussion] Bob Karhoff's "Panoramics" (Was: Re: Help me find...)

2000-10-22 Thread John Yeo
. Obviously, Karhof has worked in this area for quite some time now and his work is beautiful. I've become addicted to this stuff myself and I'd be happy to hear from anyone on the list experimenting with this kind of "panoramic" imagery. Best wishes, Guy Glo

RE: [pinhole-discussion] Help me find these pinhole photos!

2000-10-21 Thread John Yeo
Was it http://www.casema.net/~bkarhof/ John -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Philip Corlis Sent: Thursday, October 19, 2000 9:42 PM To: pinhole-discussion@p at ??? Subject: [pinhole-discussion] He

Re: [pinhole-discussion] New Pages

2000-10-11 Thread John Yeo
SFW film has worked fine for me developed in C41. John - Original Message - From: "Richard Heather" To: Sent: Wednesday, October 11, 2000 4:38 PM Subject: Re: [pinhole-discussion] New Pages > Seattle Film Works film ASA 200 > Now: > http://www.filmworks.com > Their proprietary (movie)

Re: [pinhole-discussion] Fwd: Body caps-what's the dif?

2000-10-09 Thread John Yeo
I think you're confusing it with the pinhole turret for zone VI cameras, sold by calumet for $450. John - Original Message - From: "George L Smyth" To: Sent: Monday, October 09, 2000 5:14 PM Subject: Re: [pinhole-discussion] Fwd: Body caps-what's the dif? > > At 04:56 PM 10/9/00 -0400

Re: [pinhole-discussion] Weird Flare Effects

2000-09-20 Thread John Yeo
I've had the holga lens produce flare simmilar to that of a pinhole, but it's in more of a circular pattern. Maybe it has to do with the fact that there's only one element in both. John - Original Message - From: "Jeff Spirer" To: Sent: Tuesday, September 19, 2000 7:20 PM Subject: [pinho

Re: [pinhole-discussion] Pinhole Gallery

2000-08-22 Thread John Yeo
Wow, those are really sharp. I like the one of you standing there... kinda like a ghost. John - Original Message - From: "Erich C. Decker" To: Sent: Tuesday, August 22, 2000 12:05 PM Subject: [pinhole-discussion] Pinhole Gallery > Hi, > > Just a miniature gallery of the first steps of