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- Newsgroups: rec.photo
- Path: sparky!uunet!wupost!udel!rochester!rit!isc-newsserver!ritvax.isc.rit.edu!ANDPPH
- From: andpph@ritvax.isc.rit.edu
- Subject: Re: pinhole camera
- Message-ID: <1992Dec28.032027.18614@ultb.isc.rit.edu>
- Sender: news@ultb.isc.rit.edu (USENET News System)
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- Reply-To: andpph@ritvax.isc.rit.edu
- Organization: Rochester Institute of Technology
- References: <BzwME7.8LF@fc.hp.com>
- Date: Mon, 28 Dec 1992 03:20:27 GMT
- Lines: 37
-
- In article <BzwME7.8LF@fc.hp.com>, pdn@fc.hp.com (Paul Nuber) writes:
- >
- >When building a pinhole camera, what is the optimum size for the pinhole?
- >I thought I read once that it was about 1/200th of the focal length.
-
- From what I have seen published there are about as many "correct" sizes as
- there are authors willing to share their advice on this subject! Some
- suggestions are based on empirical work, others on theoretical work and others
- still on what needles happen to be handy!
-
- There does seems to be a difference between what theory would suggest as "best"
- and what "practice" suggests is best. I am not close to any of my reference
- materials but if you are really interested let me know or drop me some mail and
- I will reply with at least 4 different answers!
-
- In the meantime something like f:200 to f:300 is about what you are shooting
- for I believe. It does depend on whether you are shooting a full color image or
- can tolerate shooting only in one color of light. If this is the case then
- preferably blue light. For the purist it is also very important to make the
- hole as round as possible and the edges as thin as possible. BTW, there is a
- nice practical book on the subject called the Hole thing, I believe. There is
- also a Pinhole Journal. Again, if there is interest I will look it up. Just let
- me know.
-
- It is somewhat amazing that in these days of ultra-sophisticted cameras and
- technology there seems to be a great many pinhole enthusiasts around! Actually
- pinhole cameras are very useful and way undervalued. For one they allow almost
- all imaging radiation to pass, something that can not be said for lenses! well,
-
- l8tr,
- andy
-
- * * * * * *
- \/\/\/\/\/\/ Andrew Davidhazy, RIT, High Speed Photography Lab.
- | | IN%"andpph@ritvax.isc.rit.edu" fax 716-475-5804
- _________/ \_____________________________________________________
-
-