C.H. et al,
I built a shutter tester with two photo diodes. They were separated by
35mm in order to get the entire face of the diodes within the frame.
The samples from my OM-1n are fairly consistant at .012s for both
curtains. However the resolution is only +/- .001sec.
This relates to a curtain speed of ~1/83s. That also correlates to the
flash sync speed of 1/60s eg. 16.7ms total exposure 11ms or 12ms to open
the curtain leaving 4 or 5ms for the flash to expose the full frame. I
used this to make sure I was "in the Ball Park" for my measurements.
Mike Butler
Dublin, California
< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >
|