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David
Joined: 13 Apr 2011 Posts: 1869 Location: Denver, Colorado
Expire: 2013-01-25
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Posted: Sun Apr 08, 2012 6:55 pm Post subject: Not exactly film, but there's no paper-negative forum |
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David wrote:
I decided to experiment with pinhole cameras this week. So for my proof-of-concept, I took a black 35mm film case, the plastic type that Kodak uses. With the smallest pin I could find, I punched a hole through the bottom where the plastic is injected. After making the camera, I researched similar contraptions and the one I saw had the hole in the side with a square of film on the back of the case. This uses a circle of paper inside the cap. So I made a crude shutter our of a small piece of black paper cut from 127 film backing and some electrician's tape. With an exacto knife, I cut circular-ish pieces of Kodak Velox F-2 paper and taped them into the cap. In bright sunlight, the proper exposure time was in the 105-second range. My light meter caps out at f32, which specified a 32-second exposure for 6 ISO film in bright light. At 105 seconds, that would indicate an aperture that's a lot smaller than 32. I made a bunch of these and here are some results. Thanks to Photoshop, I could reverse the image and display it as though it were a print.
1 Original
AT&T Park Promenade from the base of a statue (I forget who it portrays.)
1 Reversed
I'll just go with the reversed images from here out. That was to show you the original versus the reversed.
2
Looking upward at a tree
3
Palm trees, or at least the bases of them.
4
The back of AT&T Park facing the Marina.
Seven of the eight exposures returned images, but even pressing these against fences or signs left many of the shots blurry beyond recognition, what with the exposures being between 90 seconds and two minutes.
I'm going to make a YouTube video on how to make a similar camera and will share it when it's complete. _________________ http://www.youtube.com/user/hancockDavidM |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Sun Apr 08, 2012 7:04 pm Post subject: |
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iangreenhalgh1 wrote:
Interesting, I saw a very interesting blog a while back where they were doing the same but with coffee cans and 5x7 sheets. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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David
Joined: 13 Apr 2011 Posts: 1869 Location: Denver, Colorado
Expire: 2013-01-25
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Posted: Sun Apr 08, 2012 8:29 pm Post subject: |
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David wrote:
My next experiment will be an Illy coffee can with a 60X60 sheet and a Kodak D-76 replenisher can with a similar sheet. Both are different lengths and will have different relative apertures. Another idea I'm going to try is 200-foot motion picture film can that I have where a strip of film goes along the back of the can, 180 degrees, to capture a long panorama. _________________ http://www.youtube.com/user/hancockDavidM |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Sun Apr 08, 2012 9:15 pm Post subject: |
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Orio wrote:
OK, I know that I am being thick, and surely my poor English does not help, but what did you use as film? And how did you put it in place?
And, the camera was a film roll plastic can? Correct? _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Sun Apr 08, 2012 9:46 pm Post subject: |
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iangreenhalgh1 wrote:
Your English is excellent.
It's a 35mm plastic film can with a piece of photographic paper as the film. _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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Orio
Joined: 24 Feb 2007 Posts: 29545 Location: West Emilia
Expire: 2012-12-04
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Posted: Sun Apr 08, 2012 9:57 pm Post subject: |
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Orio wrote:
iangreenhalgh1 wrote: |
It's a 35mm plastic film can with a piece of photographic paper as the film. |
ah ok, I understand.
Wouldn't it be easier to take a normal film camera, drill a hole in a body cap, then use it with normal film roll, normal advance lever, etc...
and of course B as pose?
No need of darkroom to load/unload film, easier developing also. _________________ Orio, Administrator
T*
NE CEDE MALIS AUDENTIOR ITO
Ferrania film is reborn! http://www.filmferrania.it/
Support the Ornano film chemicals company and help them survive!
http://forum.mflenses.com/ornano-chemical-products-t55525.html |
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iangreenhalgh1
Joined: 18 Mar 2011 Posts: 15679
Expire: 2014-01-07
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Posted: Sun Apr 08, 2012 10:00 pm Post subject: |
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iangreenhalgh1 wrote:
Yes, that would be easier, many sellers on ebay are offering pinhole and zone plate 'lenses' just as you describe a body cap with a metal plate sit in the middle and with a hole or series of holes in it to allow light through.
http://www.ebay.co.uk/itm/Canon-EOS-Zone-Plate-Body-cap-camera-lens-Zone-Pinhole-Photography-lomo-/290678015775?pt=Camera_Lenses&hash=item43adc2871f#ht_500wt_1180 _________________ I don't care who designed it, who made it or what country it comes from - I just enjoy using it! |
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David
Joined: 13 Apr 2011 Posts: 1869 Location: Denver, Colorado
Expire: 2013-01-25
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Posted: Tue Apr 10, 2012 4:10 am Post subject: |
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David wrote:
Moderately easier, sure. But this was fun to see if it could be done. Here's a link describing how I made it:
http://beyondbokeh.blogspot.com/2012/04/diy-pinhole-camera-in-10-steps.html
And here's a video:
http://www.youtube.com/watch?v=xbXyn3lymg4&list=UUrZlzcRfCKLngZnqNTmTQjw&index=1&feature=plcp
Basically, it's just an experiment for fun and to see what results could be had. _________________ http://www.youtube.com/user/hancockDavidM |
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Nesster
Joined: 24 Apr 2008 Posts: 5883 Location: NJ, USA
Expire: 2014-02-20
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Posted: Tue Apr 10, 2012 10:36 am Post subject: |
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Nesster wrote:
Excellent, superb, I really get a kick out of this sort of experimenting. You've provided a real service. Nice images too _________________ -Jussi
Camera photos
Print Photographica
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