You can calculate the Fstop, if you want, from the focal length of each
hole. The formula for focal length is the aperture diameter in thousandths
of an inch, squared, divided by 55 equals the focal length in inches. To
find the Fstop of the aperture, divide the diameter of the aperture, in
inches, into the focal length in inches. The apertures on the Finney turret
are expressed in millimeters. divide each value by 25 to find focal length
in inches. I hope you have better luck with the Finney than I have. My dog
chewed up the mounting board this morning.
----- Original Message -----
From: susan kroeter <skpinhole@earthlink.net>
To: <pinhole-discussion@pinhole.com>
Sent: Wednesday, June 06, 2001 12:59 PM
Subject: [pinhole-discussion] finney camera
> Hi,
> Does anyone know the f-stop for the pinhole finney camera? Thank you.
> Susan Kroeter
>
>
>
>
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Received on Wed Jun 6 16:06:22 2001
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