Mark Roberts writes:
> This is fascinating because it's pretty much how I was planning on setting up a
> shutter speed tester at home. The main difference is that I was planning on
> using an infrared LED emitter/detector pair (driven by an oscillator) and a
> frequency counter set up as a manually reset event counter. Think this would
> work?
You'd need to run the oscillator pretty quick. If you run the LED on DC and
use the "period" function on your frequency counter it should work really well.
> P.S. I'll bet the K2 shutter speeds that were off were too *long* as opposed to
> too short.
Nope :) One K2 was pretty good and the other was underexposing.
Cheers,
- Dave
David A. Mann, B.E. (Elec)
http://www.digistar.com/~dmann/
"Why is it that if an adult behaves like a child they lock him up,
while children are allowed to run free on the streets?" -- Garfield
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