jason_hall5 Posted September 15, 2008 Share Posted September 15, 2008 I have just purchased a set of 12 drilled pinholes. At the moment I have two projects to use them. One is a Polaroid 100 Automatic Land camera. As I recall the polaroid pack film folders are 117mm. The other project is a lens cap pinhole for my various EOS bodies includeing film and digital. My question is simple, what would be the best starting point to choose a pinhole size for each project. As I have understood, the focal length determins much about the ideal aperture size. I just have no idea where to start. Ideas on exposure would be great too. The digital is easy enough to play with and get right, put I don't want to burn through a ton of film packs for the polaroid. For what it is worth, I will be shooting either 100 ISO or 3200 ISO. Fuji of course.... Thanks in advance Jason Link to comment Share on other sites More sharing options...
Dustin McAmera Posted September 15, 2008 Share Posted September 15, 2008 Have a look at <a href="http://www.pinhole.cz/en/pinholecameras/pinhole_01.html">this site</a> for the optimum pinhole size according to Rayleigh's formula. It also describes how to make your own pinholes. I've followed these instructions with some success. There's a link near the bottom to a page about exposure. Link to comment Share on other sites More sharing options...
jason_hall5 Posted September 15, 2008 Author Share Posted September 15, 2008 Pete! Thats Great! thanks for making it easy for me....sorry I did not look hard enough apparently. Any way, wish I knew the reciprocity failure of Fuji FP3000B or FP100B. Either way this gets me pretty darn close. Thanks Jason Link to comment Share on other sites More sharing options...
jim_momary Posted September 15, 2008 Share Posted September 15, 2008 Jason, me boy ... ye must look harderer LOL ...for the 300 - ... http://www.fujifilmusa.com/shared/bin/fp3000b-ds.pdf .... and for the 100 - .... http://www.fujifilmusa.com/shared/bin/fp100b-ds.pdf ..... your friendly neighborhood snoopy man, Jim M. Link to comment Share on other sites More sharing options...
jim_momary Posted September 15, 2008 Share Posted September 15, 2008 and ..... LOL .... http://www.fujifilmusa.com/shared/bin/ProfessionalFilmDataGuide.pdf .... tada! :-) Link to comment Share on other sites More sharing options...
patrick j dempsey Posted September 15, 2008 Share Posted September 15, 2008 I was gonna suggest that too! It's a great little program and very useful for projects other than just pinholes. :) Link to comment Share on other sites More sharing options...
connealy Posted September 15, 2008 Share Posted September 15, 2008 I think I used this formula: <br><br> <b>1/25 the square root of the distance between the pinhole aperture and the film plane (focal length)</b> <br><br> If you start looking around the web, you'll find quite a few different answers. Luckily, the size of the hole is only one small issue in making pinhole images. <br><br> You can see my results on <a href="http://mconnealy.com/pinhole/index.html" target="new">my pinhole pages</a>, though they are not likely to correspond to yours as I am partial to much shorter focal lengths. Link to comment Share on other sites More sharing options...
jim_graves1 Posted September 15, 2008 Share Posted September 15, 2008 Where'd you find the pinhole assortment? Link to comment Share on other sites More sharing options...
jason_hall5 Posted September 15, 2008 Author Share Posted September 15, 2008 I am so glad that I could you fellas a good laugh. I did not intend for anyone to look up the reciprocity failure info. In any case, as it turns out I had down loaded both of the PDF documents a while back but had forgotten about them. I found them with google back when I first started to use them in a Polaroid 250. I am now using the Zeiss viewfinder and the camera back on a 195 that I bought a while back. Anyway thanks again to everyone. You are right Patrick, that small program will be very useful, and very much worth getting laughed at. :o) To Jim Graves, A dealer on E-bay sells them. I think he goes by "pinholebilly". Apparently he makes them himself. I bought them from him because I saved a few bucks doing so. I really don't know how accurate they are. But hey! I managed to find them on my own! :o) Here is an on line dealer that seal a fair amount on Pinhole products. Yet another one I found all by my little lonesome self.... http://www.pinholeresource.com/shop/shop?page=shop.browse&category_id=16 Jason Link to comment Share on other sites More sharing options...
jason_hall5 Posted September 15, 2008 Author Share Posted September 15, 2008 Mike, I am inspired by your images. I would have not have thought those were pinhole images at first glance. Well done. Link to comment Share on other sites More sharing options...
mark_hahn Posted September 15, 2008 Share Posted September 15, 2008 here was page from years ago: http://www.geocities.com/markhahn2000/pinhole_concepts.html here are some photos: http://www.geocities.com/markhahn2000/minox_format_pinhole_photographs.html http://www.geocities.com/markhahn2000/goodbye_conn.html http://www.geocities.com/markhahn2000/a_couple_more_minox_ph.html they were taken with this tiny little camera: http://www.geocities.com/markhahn2000/minox_format_pinhole.html hmmm... I think I have to play around with some of my pinhole camera again! :) Link to comment Share on other sites More sharing options...
mark_hahn Posted September 16, 2008 Share Posted September 16, 2008 FWIW, when I have tried pinholes on my DSLRs the results kind of all sucked... can't explain it, but striking a sensor seems different than film... Link to comment Share on other sites More sharing options...
mark_hahn Posted September 16, 2008 Share Posted September 16, 2008 I think this was a nice cheap way in with some style: http://www.geocities.com/markhahn2000/argus_a_p.html have fun!! Link to comment Share on other sites More sharing options...
jason_hall5 Posted September 16, 2008 Author Share Posted September 16, 2008 Thanks to everyone for the info. Mark, I will most likely have the same result as you in the long run with the Digital. But it is easy and I have the stuff to do it so why the heck not. Any way, thanks again Jason Link to comment Share on other sites More sharing options...
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