Re: Re: [pinhole-discussion] Polaroid exposures
- Original Message - From: > EV 15: > 1/125 @ f/16, 1/60 @ f/22, 1/30 @ f/32, 1/15 @ f/45, 1/8 @ f/64, 1/4 @ f/90, > 1/2 @ f/128, 1 sec @ f/180, 2 sec @ f/256, 4 sec @ f/360, 8 sec @ f/512. Couple of things: 1- Polaroid 804 will require reciprocity corrections for exposures above 0.04 seconds (as per polaroid.com). 2- If you meter snow and expose your film using the indications of your meter, the snow will be render as grayish instead of white. We need to increase exposure by about 2 stops so snow is rendered white. Your 8 seconds @ f/500 then become 32 seconds and those 32 seconds become about 180 seconds when reciprocity compensation is taking into account (as per Polaroid.com). Guillermo
Re: Re: [pinhole-discussion] Help! from the Girl Scouts
Thanks for responding: I am sending one booklet to John McAdam. I would like to send a free booklet to you, but I have run out of slightly damaged books, I give the damaged ones away. I will send you free information about the booklet. It is not very expensive if you decide to purchase it. I may have some later on that may be damaged. I give some booklets sometimes to a camera club in Illinois. Lonnie
Re: Re: [pinhole-discussion] Polaroid exposures
EV 15: 1/125 @ f/16, 1/60 @ f/22, 1/30 @ f/32, 1/15 @ f/45, 1/8 @ f/64, 1/4 @ f/90, 1/2 @ f/128, 1 sec @ f/180, 2 sec @ f/256, 4 sec @ f/360, 8 sec @ f/512.
[pinhole-discussion] WPPD - Calling all Canadian pinholers!
Hi all pinholers from Canada! As coordinator for the promotion of the Worldwide Pinhole Photography Day in Canada, I would like to ask for your support so that we have a massive participation from this country. I am based in Montreal and can easily cover the Province of Quebec. But I am much less knowledgeable about the photographic scene elsewhere in the country. I hope that there are members from Toronto, Ontario, Western Canada, the Maritimes who will work with me to make this a real success in Canada. Please contact me, so that we can coordinate our efforts. Cheers and thanks in advance for your help. Guy Glorieux
Re: Re: [pinhole-discussion] Polaroid exposures
Hi this is Lonnie: I have a question about your answer to Bill about pinhole exposures @ f/500 with ISO 100 film. Looking at my light meter without any reciprocity corrections a sunny f/16 exposure should be about 8 seconds @ f/500. If you have heavy sun as well as bright snow I would use 4 seconds as my base for an exposure. The 8 seconds @ f/500 would be EV 15 The 4 seconds would be EV 16. Lonnie
Re: [pinhole-discussion] Polaroid exposures
- Original Message - From: > Hi this is Lonnie. > > Your exposure, I would try 4 to 8 seconds in bright snow with a bright sky, > which would probably give you a EV15 to EV16 with an ISO 100 film. > > Glad to hear you are using an 8x10 camera. I am thinking of making an 8x10 > camera out of banker boxes. Hi Lonnie, EV15 equates to an exposure of f/16 @ 1/125 secs (for instance), which pretty much confirms Sunny/16 for ISO-100. Would you care to elaborate how and exposure of 4 to 8 secs could be a proper exposure when the aperture is f/500? Thanks, Guillermo
Re: [pinhole-discussion] Polaroid exposures
Hi this is Lonnie. Your exposure, I would try 4 to 8 seconds in bright snow with a bright sky, which would probably give you a EV15 to EV16 with an ISO 100 film. Glad to hear you are using an 8x10 camera. I am thinking of making an 8x10 camera out of banker boxes. Lonnie
Re: [pinhole-discussion] Fisheye pinhole??
A fisheye lens is a very wide angle lens. It is most common on the 35mm camera. The fisheye lens gets its name from its looks. A big wide lens that protrudes from the camera, it looks like a bulging eye of a fish. A big globe of glass, It generally covers an angle of180 degrees. The lens usually has a focal length of 8mm on a 35mm camera. Nikon even made a 6mm lens which could be ordered directly from Nikon. It covers an angle of over 200 degrees, which ment it could possibly see parcially around your back. The fisheye lens usually is designed to produce a circular image on the film. There are full frame fisheyes too. Ultra-wide lenses on a 35mm camera of15mm or less have been called fisheyes. Medium format cameras have some full frame fisheye lenses too. For the 4x5 format we used to say 47mm was like a fisheye lens. Lonnie
Re: [pinhole-discussion] Help! from the Girl Scouts
> Lonnie, > Thanks for your suggestions. I'm not in the Girl Scouts, but was following > the thread. I'd like to read your Pinhole Booklet, if you want to send it. > > John McAdam > 4 Pine Hill Court > Northport NY 11768-3441 me too. I do Pinhole with my students, but I'm not sure if you're going to send it to Brazil. Ana Maria Schultze Rua Macambira, # 117 São Paulo - SP 02342-070 - Brazil regards from Brazil Ana Maria Schultze Sao Paulo - SP - Brasil - arte-educar-ow...@egroups.com arteeducad...@hotmail.com uin 1457876 Conheça a lista de discussão sobre arte-educação: http://www.egroups.com/group/arte-educar Veja as mensagens já postadas em: http://www.eScribe.com/art/arte-educar/
Re: [pinhole-discussion] Polaroid exposures
In a message dated 4/4/01 10:40:37 AM Pacific Daylight Time, paintedho...@in-tch.com writes: > The prints keep coming out real > light. Dont forget,with polaroid film,too light is too long of an exposure..try to expose the next shot for 1/2 as long.. Just my 2 cents.. Harry http://www.figurefoto.com/";>Figurefoto.com
Re: [pinhole-discussion] Polaroid exposures
Bill, Here is a brief analysis I've done: Assuming bright open sky conditions, shooting snowy scenes call for about +2 stops from whatever the meter indicates for the snow. Using sunny/16, your exposure should be f/16 @ 1/25 secs. There are about 10 stops separating f/16 from f/500, therefore for your camera, the uncorrected exposure time should be around 40 secs (2^10 * 1/25). According to Ilford HP5 reciprocity correction, 40 sec exposure should become 200 secs exposure. But according to Polaroid.com, an exposure of 40 secs needs a correction of -2.7 f/stops for 804 film. reciprocity corrections in f/stops do not equate exactly to corrections of doublings of exposure time, but assuming they do, 40 secs should become around 260 secs (2^2.7 * 40). BTW, it is not a good idea to use reciprocity corrections charts for one film and apply them to a totally different film/technology/manufacturer. Could you tell us what's your metered or estimated uncorrected exposure time and actual exposure times you have used? Guillermo - Original Message - From: "The Painted Horse" > > I could use some help here. We just got a wonderful spring time > snowfall yesterday (10") and it got me out and about with my 8x10 > pinhole camera (due to the extra light reflection of the snow). I tried > using Polaroid type 804 ASA 100 (first time using this film) and I can't > seem to get the exposures correct. The prints keep coming out real > light. Now, I could keep adjusting the time exposures but it is > expensive film and I really don't want to use the whole box of film as > testing material (that is, if I can help it). > The camera is a normal focal length (13 inches) Leonardo 8x10 and the > pinhole is F 500. Anyone out there do 8x10 pinhole Polaroids? For some > reason the time charts I use for Ilford HP5 aren't working. And yes, I > calculate for the difference in the film speeds. Any help would be > appreciated.
[pinhole-discussion] Polaroid exposures
Hello All! I could use some help here. We just got a wonderful spring time snowfall yesterday (10") and it got me out and about with my 8x10 pinhole camera (due to the extra light reflection of the snow). I tried using Polaroid type 804 ASA 100 (first time using this film) and I can't seem to get the exposures correct. The prints keep coming out real light. Now, I could keep adjusting the time exposures but it is expensive film and I really don't want to use the whole box of film as testing material (that is, if I can help it). The camera is a normal focal length (13 inches) Leonardo 8x10 and the pinhole is F 500. Anyone out there do 8x10 pinhole Polaroids? For some reason the time charts I use for Ilford HP5 aren't working. And yes, I calculate for the difference in the film speeds. Any help would be appreciated. Oh, by the way, I let the Polaroid film warm up before processing it, and it is fresh film. Thank you in advance! Bill-
[pinhole-discussion] World Pinhole Day Promotion. Calling all list members!
Hi everybody! Yes this is really happening. The 1st Worlwide Pinhole Photography Day is on its way. But it will happen in a big way only if we ALL work at promoting it! At present, the information has been circulated to this list only. We need to go beyond and reach every corners of the world. And, to this end, I would like to call on everyone to help in promoting the event. To be successful in the short timeframe that remains, this has to be a grassroots exercise. It also has to be a coordinated exercise. I have sketched out an outline of how we might go about it at: http://www.pinholeday.org/org/promoting.html I hope that everybody will take time to go to this page and read it carefully. It will help anyone who is interested in promoting the WPPD in their local area. It provides some ideas as to how best to do it, who to contact and in what form. I hope that it will stimulate your interest in making this first Pinhole Day happen in a big way and in promoting it around you. We need to reach a lot of people: the news media, galleries, camera stores, camera clubs, anybody even remotely interested in pinhole photography. And this in all regions of the world! ONLY YOU CAN DO IT! If you are interested in volunteering time and energy to do more than just passing on the information to other pinhole friends or your local camera store, please email me or contact the Regional Coordinator for your region, if one is already in place. Check the same web page to see if someone has already volunteered http://www.pinholeday.org/org/promoting.html Several regions are lacking a Regional Coordinator. If you would like to act as a Regional Coordinator for promoting the event, please contact me. We need the help of everybody! This is YOUR day! Cheers, Guy Glorieux
Re: [pinhole-discussion] Help! from the Girl Scouts
Guillermo, Thanks for the site and the advice. Hopefully I'll have the 4x5 done by the 29th! John
Re: [pinhole-discussion] Help! from the Girl Scouts
>- Original Message - >From: jmm1...@aol.com >Lonnie, >2. Where on earth do you get a 0.018" drill bit for a Dremel (hobby drill)? John, Look for WIRE GAUGE DRILL BITS. Usually they are sold in packages of several bits (you'd need them because they are so fragil and brake easely). This place for instance: http://www.widgetsupply.com/html/d-drills.html sells them in packages of 10 @ 3.49. As you can see, they sell up to drill bit #80 which is a 0.014" diameter. Wire gauge drill bits go -at least- up to the #97, which is just 0.0059" in diameter!! "optimum" for 17mm focal length. Guillermo
[pinhole-discussion] Re: joycam
> > >http://www.sci.fi/~mjkoskin/vgallery/oldwood.jpg > > > > Matti, > Cool shot..I am curious though,what is the price of the > joycam in finland? > > Harry > Figurefoto.com Thanks Harry. The price of joycam here is ~$32. -matti mjkos...@sci.fi
[pinhole-discussion] Fisheye pinhole??
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] Help! from the Girl Scouts
Lonnie, Thanks for your suggestions. I'm not in the Girl Scouts, but was following the thread. I'd like to read your Pinhole Booklet, if you want to send it. John McAdam 4 Pine Hill Court Northport NY 11768-3441
Re: Re: [pinhole-discussion] Help! from the Girl Scouts
Hi This is Lonnie: The focal lengths that you mentioned for your pinhole camera are of a very wide angle of view. Many pinhole photographers do use a wide angle view. I have a friend who is a professional advertising photographer who has a pinhole camera that is like a fisheye lens. The normal focal length of a 4x5 camera would be 6.5" (6 1/2). This focal length would be similar to a 50mm lens on a 35mm camera. The 0.018" drill and drill bit I got from a large hobby shop that caters to railroad hobbiests. If you use a #10 sewing needle and put the end with the eye in a pencil erasor, you can use it as a drill, by turning and lightly pushing the needle through the thin sheet of brass. A #10 needle is 0.018" diameter. Remember I will give you a booklet I wrote on the pinhole camera since you are with the girl scouts. All you have to do is request it. If you have any more questions about photo labs, pinhole photography, or any other photographic questions just ask. PHOTO-ED Lonnie Paulson P.O. Box 80305 Minneapolis, MN 55408 612-827-1084 Lonnie
