Pinhole wizards,
By chance, I photographed a needle and projected it, only to find it had 2 different angles of taper and the diameter was different everywhere along the length of the needle! Checked a lot more needles and found the same thing. The question: where on the needle does the diameter from the much published chart of needle size / diameter apply? If this chart turns out to be mythological, it will only increase my esteem for the inexact art of pinhole photography.
Thanks
Jim
Received on Tue Sep 12 10:05:29 2000
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