John Gruffydd wrote:
> AFAIK provided that the flash is quenched (before the capacitor has
> discharged completely), the quench circuit will generate the "OK"
> signal. If you don't get the signal, it means that the capacitor has
> discharged fully and the result may be under-exposure.
We both have fairly unusual surnames. I can honestly say I wasn't expecting to
meet someone off the IAM list here!
I find that where I haven't had the OK signal, about 50% tend to be
under-exposed and the rest are okay.
> In turn, the
> instruction to quench (the thryristor circuit terminates the flash
> before the capacitor has discharged fully) is derived from the camera
> in TTL mode or the light sensor in the "O" in Auto mode.
So the only way I can control the flash completely myself is to use the 32/16
settings on manual on the T32 (or equivalent on the T20)? And then I can
measure the flash/flashes with the flash meter, and then set the f-stop
accordingly.
Is there an easy way of triggering multiple flash units simultaneously for test
puroposes without using a spare body loaded with duff film?
Thanks,
Simon
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