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01/05/2005 09:24:50 PM · #1 |
I read in shutterbug magizine today that you can make a pinhole lense for you dslr, but I was very confused on how. Does anyone know how to do this and care to share some directions to do so
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01/05/2005 09:26:15 PM · #2 |
there is a thread about it
was active maybe 1-2 months ago
wait
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01/05/2005 09:26:42 PM · #3 |
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01/05/2005 09:28:55 PM · #4 |
see this thread for pin hole digital and this for DIY lenses
EDIT: note: my link to pinholes is not the same as Yura's
Message edited by author 2005-01-05 21:29:56.
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01/05/2005 11:26:42 PM · #5 |
so then, this cap has a .011" hole for a Canon EOS camera..a 300D should work.
Equivalent to 50mm at F180...any mathematics on what the shutter speed would be IF the normal exposure was 1/60 at F5.6?
Any idea on DOF?
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01/05/2005 11:31:02 PM · #6 |
Originally posted by Prof_Fate:
so then, this cap has a .011" hole for a Canon EOS camera..a 300D should work.
Equivalent to 50mm at F180...any mathematics on what the shutter speed would be IF the normal exposure was 1/60 at F5.6?
Any idea on DOF? |
or sensor dust?
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01/06/2005 12:10:24 AM · #7 |
Hmm, dust. the hole is small...need a 'lens' too i guess. slide glass? (for microspcopes)
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01/06/2005 12:52:19 AM · #8 |
Originally posted by Prof_Fate:
so then, this cap has a .011" hole for a Canon EOS camera..a 300D should work.
Equivalent to 50mm at F180...any mathematics on what the shutter speed would be IF the normal exposure was 1/60 at F5.6?
Any idea on DOF? |
The field of view of this pinhole is the same as a 50mm lens. For a pinhole, Focal Length (which is really only meaningful for LENSES, not holes) is theoretically zero, so the DOF is effectively infinite.
The difference between f5.6 and f180 is 10 stops so................
1/60 @ F5.6 = 16sec @ f180
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01/06/2005 12:57:12 AM · #9 |
Originally posted by Prof_Fate:
so then, this cap has a .011" hole for a Canon EOS camera..a 300D should work.
Equivalent to 50mm at F180...any mathematics on what the shutter speed would be IF the normal exposure was 1/60 at F5.6?
Any idea on DOF? |
About 15 seconds according to one other site and this pinhole calculator.
Google is your friend. =) |
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01/06/2005 01:07:41 AM · #10 |
Originally posted by yurasocolov:
Originally posted by Prof_Fate:
so then, this cap has a .011" hole for a Canon EOS camera..a 300D should work.
Equivalent to 50mm at F180...any mathematics on what the shutter speed would be IF the normal exposure was 1/60 at F5.6?
Any idea on DOF? |
About 15 seconds according to one other site and this pinhole calculator.
Google is your friend. =) |
I just did it in my head, hard to take google out on location
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01/06/2005 01:22:08 AM · #11 |
Originally posted by Prof_Fate:
so then, this cap has a .011" hole for a Canon EOS camera..a 300D should work.
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btw, I bought my R72 Hoya IR filter from Freestylephoto.biz and had no problems at all. They were even great when I returned it because I wasn't happy with the results. True pros. |
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01/06/2005 01:44:16 AM · #12 |
Originally posted by Spazmo99:
I just did it in my head, hard to take google out on location |
didn't see your post, i was already looking for calculators and typing mine up when you posted. Anyway, a link to the calc is helpful, hopefully, and it also proves that your mental math is dead on accurate =) |
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