On Thursday, October 24, 2002, at 11:39 PM, Thom Mitchell wrote:
Didn't finish reading all the posts, I would be interested in a 7 ring
and a
21 ring for 50 mm, say $10 each (negotiable of course), plus maybe
one in
the 75mm range for starters. Flexible, again let me know what you want
becaus
There's a set of llustrations somewhere around page 120 in Eric renner's
book that illustrates the effevct of different pinhole size at the same
distance from the image. Very few people so far as I know have deliberately
ventured toward the "too small" size.
- Original Message -
From: "Joh
What a wonderful atmospheric image! Keep that camera or sell it to me! ;0)
-Gina
also from New Jersey
John Brownlow asks about pinhole diameter.
I did some experiments with a set of pinholes I have. It seemed to me
that the optimal
pinhole as determined by the formula did produce sharper results than
smaller or larger pinholes.
The formula that I use does not refer to the outer diffraction ring
The standard formula for optimum pinhole diameter is quoted everywhere, but
has anyone actually done some experiments to see if photographic results
confirm it? I saw a quote by Larry Bullis somewhere to the effect that he
had not observed any diminishing returns in going smaller. Here it is:
The standard formula for optimum pinhole diameter is quoted everywhere, but
has anyone actually done some experiments to see if photographic results
confirm it? I saw a quote by Larry Bullis somewhere to the effect that he
had not observed any diminishing returns in going smaller. Here it is:
