At 12:00 2/17/03, you wrote:
All,
Interesting thing here -- help please!
[snipped out monolight/slave description]
Dave,
Dive into the specs on the camera. Optical slaves are not only sensitive
to visible light, they are just as sensitive to IR.
1) Does the camera perform an IR or visible light pre-fire to assist with
focusing or evaluative metering?
2) Can you turn off AF and evaluative metering entirely and try shooting it
in "manual" mode, both AF and AE (this *might* turn off a pre-fire)?
I strongly suspect some form of pre-fire that is either so low powered or
close to the flash going off you cannot detect it, or tha it's non-visible
IR, and this is pre-firing your monolights. If I had to bet on it, I'd bet
on an extremely low powered visible light pre-flash for the AE (E-TTL ??)
system.
-- John
< 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 >
|