RE: 35 mm body f.l. determination

okydoky...
enough brain fry...
time to try...

(don't forget to show us....)

have fun
andy schmitt

-----Original Message-----
From: pinhole-discussion-admin@pinhole.com
[mailto:pinhole-discussion-admin@pinhole.com]On Behalf Of Murray
Sent: Monday, October 01, 2001 7:28 PM
To: pinhole-discussion@pinhole.com
Subject: [pinhole-discussion] 35 mm body f.l. determination

I hope I did it right - I took a steel rule as well as a depth caliper and
measured the distance from the film pressure plate at the back of the
camera...I declared this to be the focal plane.

I measured to where I anticipated my pinhole disk would mount and took that
distance as the f.l. I came up with 38 mm.

Then I went to one of those pinhole calculator websites (hopefully someone
has given you a link already) and picked a diameter that gave me enough
coverage to illuminate the entire 35 mm negative.

It wasn't 'optimal', but I hope it works...still trying to finish the first
roll...it's either raining or I'm running late in the morning so I don't
stop to take any shots.

I hope it's somewhere in range...I used a 250 micron (0.25 mm) hole. (bought
it commercially).

Murray

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Received on Mon Oct 1 19:31:55 2001