Hi Giorgio,
I made my own tester that turned out similar to the one described at
<http://www.geocities.com/Yosemite/2131/shspeed.html>
although my circuit is a little different. I wouldn't recommend using
the circuit as shown on the web page. I also use two photodiodes
so I can measure the curtain travel time. At first, I used the stereo
sound inputs on my computer to record the data, and it works, but requires
a fair amount of post processing to measure the shutter speed. I was
lucky
enough to find a slightly-broken HP digital oscilloscope at a surplus sale
for $20 (does that count as a DFFGF, even though it isn't OM? ;-) which
works
perfectly for this application.
>I wonder if anybody can point me in the right direction. I have a number of
>Canon FD bodies, Olympus OM bodies and some lenses for a little care hacking
>and I'm looking for a good and not overly expensive shutter speed tester. I
>know about:
>
>1) Tomosy's routine for the Commodore 64
>2) Calumet's tester
>3) National camera's tester.
>
>Is anybody out there using any of these? Anybody have a shutter speed tester
>they want to part with? Anybody have advice, hints, tips or mental health
>coverage in this area?
Measuring shutter speeds is easy. It's the adjusting that kills you :-)
Take your time, and if you get frustrated, let it be for a while. I'm
in the process of getting things set up again so I can turn my plastic
baggies of parts back into a working OM-1n, since I was so rudely
interrupted
by moving and finishing school :-)
>Thanks.
>
>Giorgio Piccagli
>Sluggish at slow speeds, unpredictable at high speeds
Good luck!
Mark Marr-Lyon
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