Depends on the film. If it's a typical color negative film and you've
inadvertently set the ASA too low (in effect, overexposing the film), I
wouldn't worry about it. Most 400 films can handle being set to 200; 200
can handle 100; etc. Underexposure is trickier but many films can handle up
to a full stop of underexposure without significant loss of printability.
With autoexposure cameras like my XA-3 (after taping over the DX code bars)
I've routinely adjusted the ASA setting up and down in the same roll to
ensure a fast enough shutter speed in dim light to prevent blur, or a slower
shutter speed/wider aperture to offset strong backlighting. With 400 and
800 color print films most shots turn out great. Even with slower films it
works pretty well. I wouldn't try it with slide films tho'.
Lex
===
From: Dan Lau <dlau@xxxxxxxxxxxxxxxx>
Subject: [OM] What to do if ASA is set wrong
Date: Thu, 17 Aug 2000 14:06:29 -0400 (EDT)
Once in a while, I'd put a roll of film into a camera and
forget to reset the ASA (the lowly OM-1 does not have DX
coding capability like on the OM-PC/40 :-)). Then
somewhere in the middle of the roll, I'd notice that the
ASA does not match the film. So what is the best course
of action to take when one realizes that the ASA is not
set correctly?
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