confusion re: pinholga

Hi, I ordered a pinholga from the Holgamods site about a week ago. I
got it yesterday and tried it out today.

http://www.holgamods.com/pinholga/pinholga.html

  But I am confused about exposure times. The website says that the
pinholga has an aperture of .0079" or .2010mm, and that is f/215. This
is not in agreement with Eric Renner's book, which says that such a
pinhole is f/148.

The pinholga exposure guide on the website
(http://www.holgamods.com/pinholga/exposure/exposure.html) says to
multiply the f/64 reading by 12 to get the exposure time (and add time
as needed for reciprocity failure). But the Pinhole Designer software
(recommended on the Pinholga site and downloaded by me) says that this
pinhole diameter is f/199 and that you should multiply f/64 by a
factor of 10. It also says that this pinhole diameter is optimal for a
focal length of 20mm, not 40mm, as stated on the holgamods site.

So I am wondering: are my images going to be sort of fuzzy because the
pinhole is not the optimal size? And, should I multiply by 10 or by
12?

Has anybody else had any experience with this camera?

--shannon
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Received on Tue May 22 21:04:43 2007