At 08:26 AM 10/29/99 +0800, you wrote:
>
>Diffraction is a physical result of having a small hole, imperfections will
>only modify the diffraction pattern. If you are concerned about
>imperfections, why use a pinhole at all ?
>
diffraction is a result of having a hole that is too small. pinholes of the
proper size apparently don't suffer from diffraction problems.
>Why would you spend that amount of money on a 50mm focal length pinhole when
>you can buy a good used 50mm f1.8 from Olympus Guy for the same price ?
>
pinhole is different than ordinary photography, that's why.
Be seeing you.
Dirk Wright
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