RE: [pinhole-discussion] The Wyndham Montreal Hotel Giant Pinhole Camera Project
Now that sounds like fun..have a great time Guy andy -Original Message- From: pinhole-discussion-admin@p at ??? [mailto:pinhole-discussion-admin@p at ???]On Behalf Of Guy Glorieux Sent: Wednesday, April 17, 2002 7:45 AM To: pinhole List Subject: [pinhole-discussion] The Wyndham Montreal Hotel Giant Pinhole Camera Project Hi all, For those that are interested, I'll be turning a hotel room in Montreal into a giant pinhole camera on April 28. Details of the project can be found at the following URL (Zernike has offerd to build and host the web site which is still in progress): http://www.zeroimage.com/Guy/PinholeHotel.html We will be a team of four photographers. The room will be on the 6th floor, kindly offered by Wyndham Montreal Hotel, for the period from saturday noon to monday noon. This will give us lots of time to do the set-up ahead of time. The image will be printed on Ilford RC VC paper, with a yellow filter on the pinhole. We'll be working with 3 strips of 50 in. x 9 feet from a roll of 100 feet. The pinhole should be about 0.1'' diameter with a focal length of 10 feet. This works out an f-stop of F-1200. With a yellow filter and paper at ISO 3, this should work out to an exposure time of about 1.5 hrs on a sunny day. There are no reciprocity failure charts for paper, but it is just as real as for film. So I'll have to make some tests before next week but I expect to end up with an exposure time of maybe 8-12 hrs. I just hope that it'll be sunny weather outside. If it's rainny, we can either move the paper closer to the window and shorten the focal length to open up the F-stop or work with a larger pinhole diameter and get a somewhat more blurry image. The plan is to calculate the focal length/F-stop based on the weather outside so as to be able to open the shutter at 00:00hr on Sunday April 28 and to let the exposure run until 24:00hr. We'll be using RC paper and, once we have the paper negatives, we'll make a 4' x 8' contact print from each of the three 50'' x 9'. (You soak the paper negative and the unexposed paper positive, squeegee them together and do you exposure). I have not yet got around to making tests but I do not see any major difficulties here, assuming that I managed to get through the first stage of processing the paper negative. We'll be using wallpaper tanks to roll and unroll the paper in the chemistry. Washing and drying will be the tough parts. The final paper negative and positive (3 each) will be mounted on thick board to make a twin triptych - either all 3 positive and all 3 negative or alternating 1 positive and 1 negative. Cheers, Guy ___ 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] The Wyndham Montreal Hotel Giant Pinhole Camera Project
Guy, What a great idea. I wished I'd have thought of that. I wish you the best of luck, and I can't wait to see the image. James
Re: [pinhole-discussion] The Wyndham Montreal Hotel Giant Pinhole Camera Project
Guy et. al.! All the best for your very ambitious pinhole hotel project! Eager to see the images on web. -Achal - Original Message - From: "Guy Glorieux" To: "pinhole List" Sent: Wednesday, April 17, 2002 4:44 AM Subject: [pinhole-discussion] The Wyndham Montreal Hotel Giant Pinhole Camera Project > Hi all, > > For those that are interested, I'll be turning a hotel room in Montreal > into a giant pinhole camera on April 28. Details of the project can be > found at the following URL (Zernike has offerd to build and host the web > site which is still in progress): > http://www.zeroimage.com/Guy/PinholeHotel.html > > We will be a team of four photographers. The room will be on the 6th > floor, kindly offered by Wyndham Montreal Hotel, for the period from > saturday noon to monday noon. This will give us lots of time to do the > set-up ahead of time. > > The image will be printed on Ilford RC VC paper, with a yellow filter on > the pinhole. We'll be working with 3 strips of 50 in. x 9 feet from a > roll of 100 feet. The pinhole should be about 0.1'' diameter with a > focal length of 10 feet. This works out an f-stop of F-1200. With a > yellow filter and paper at ISO 3, this should work out to an exposure > time of about 1.5 hrs on a sunny day. > > There are no reciprocity failure charts for paper, but it is just as > real as for film. So I'll have to make some tests before next week but > I expect to end up with an exposure time of maybe 8-12 hrs. I just hope > that it'll be sunny weather outside. If it's rainny, we can either move > the paper closer to the window and shorten the focal length to open up > the F-stop or work with a larger pinhole diameter and get a somewhat > more blurry image. > > The plan is to calculate the focal length/F-stop based on the weather > outside so as to be able to open the shutter at 00:00hr on Sunday April > 28 and to let the exposure run until 24:00hr. > > We'll be using RC paper and, once we have the paper negatives, we'll > make a 4' x 8' contact print from each of the three 50'' x 9'. (You > soak the paper negative and the unexposed paper positive, squeegee them > together and do you exposure). I have not yet got around to making > tests but I do not see any major difficulties here, assuming that I > managed to get through the first stage of processing the paper negative. > We'll be using wallpaper tanks to roll and unroll the paper in the > chemistry. Washing and drying will be the tough parts. > > The final paper negative and positive (3 each) will be mounted on thick > board to make a twin triptych - either all 3 positive and all 3 negative > or alternating 1 positive and 1 negative. > > Cheers, > > Guy > > > ___ > 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] The Wyndham Montreal Hotel Giant Pinhole Camera Project
Guillermo wrote: > For 6 hrs multiply time by 21.5 for a total 129 hrs Thanks Guillermo! I knew it...! I knew that, somewhere, you might have that reciprocity information, tucked it in a hidden place I didn't really want to hear about! Now I won't have any excuse! I suppose that a 129 hrs exposure (i-e after correction for reciprocity) will disqualify me from WPPD anyways. This is well over 5 days and that takes me past PH-day deadline. Darn' it! But look! These five days have an equal number of nights during each of which the exposure requirements is many, many stops above the daytime exposure (this, of course, uncorrected for reciprocity). Which means that the uncorrected time soon gets calculated in terms of months, instead of days. But then these months, after correction, turn into at least a couple of years, themselves requiring a further adjustment. Now, I'll soon be turning 56 (totally uncorrected, as you may have guessed!) and since my daughter is expecting her first child at the end of the summer, there is a real possibility that my great-grandchildren will get to see the end of this exposure in their/their lifetime. Hmmm... I'd better get going, folks! Otherwise, if I wait a second or two, even my great-great-grandchildren will not get to see this picture! I see why the People of the Spirit never took a decision before considering the implications for their children down to at least seven generations. So long. G't to go...! ...-:)) Guy - Original Message - From: "G.Penate" To: Sent: Wednesday, April 17, 2002 10:18 AM Subject: Re: [pinhole-discussion] The Wyndham Montreal Hotel Giant Pinhole Camera Project > > - Original Message - > From: "Guy Glorieux" > > > > There are no reciprocity failure charts for paper, but it is just as > > real as for film. So I'll have to make some tests before next week but > > I expect to end up with an exposure time of maybe 8-12 hrs. > > Guy, I have a reciprocity table for paper in my page > http://members.rogers.com/penate/pinsize.htm it only gives you corrections for > up to 20 minutes, but I just rapidly extrapolated some other values I hope are > of some use for you as "starting point". Here they are: > > For 30' multiply time by 7 for a total of 3 1/2 hrs > For 1 hr multiply time by 9.5 for a total 9 1/2 hrs > For 1.5 hrs multiply time by 11.5 for a total 17 1/4 hrs > For 2 hrs multiply time by 13 for a total 26 hrs > For 2.5 hrs multiply time by 14 for a total 35 hrs > For 3 hrs multiply time by 15.5 for a total 47 hrs > For 6 hrs multiply time by 21.5 for a total 129 hrs > > > The plan is to calculate the focal length/F-stop based on the weather > > outside so as to be able to open the shutter at 00:00hr on Sunday April > > 28 and to let the exposure run until 24:00hr. > > That is a wise decision! > > Wish I could be there! :-( > > Best of luck, Guy and your fellow photographers. > > 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] The Wyndham Montreal Hotel Giant Pinhole Camera Project
- Original Message - From: "Guy Glorieux" > > There are no reciprocity failure charts for paper, but it is just as > real as for film. So I'll have to make some tests before next week but > I expect to end up with an exposure time of maybe 8-12 hrs. Guy, I have a reciprocity table for paper in my page http://members.rogers.com/penate/pinsize.htm it only gives you corrections for up to 20 minutes, but I just rapidly extrapolated some other values I hope are of some use for you as "starting point". Here they are: For 30' multiply time by 7 for a total of 3 1/2 hrs For 1 hr multiply time by 9.5 for a total 9 1/2 hrs For 1.5 hrs multiply time by 11.5 for a total 17 1/4 hrs For 2 hrs multiply time by 13 for a total 26 hrs For 2.5 hrs multiply time by 14 for a total 35 hrs For 3 hrs multiply time by 15.5 for a total 47 hrs For 6 hrs multiply time by 21.5 for a total 129 hrs > The plan is to calculate the focal length/F-stop based on the weather > outside so as to be able to open the shutter at 00:00hr on Sunday April > 28 and to let the exposure run until 24:00hr. That is a wise decision! Wish I could be there! :-( Best of luck, Guy and your fellow photographers. Guillermo
