Mike wrote:
> My Viv 283 manual states sic "flash duration (approx)
> 1/1000 second (manual)
> 1/1000 to 1/30,000 second (automatic)"
> Experiment reliability should trump the manual.
> I have seen GN for the 283 reported at about 1/2 of 120
> (at least outdoors) ASA 100 and almost never 120 even
> inside.
As stated before, GN is always calculated indoors
with certain reflecting bit essential to it. And
a little optimism always was added too by the flash
makers. Only few were precise, METZ being one
reputedly being more serious and true to reality.
That is why a flash meter comes in handy in critical
situations.
> Might be worth an e-mail to Vivitar to see what's up.
I doubt the usefulness of such action. It always was
that way and it always be be ...
> Wonder what the GN of the T20 and 32 are outdoors.
1/2 off too.
Andreas
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