David Brooks asked:
> ISO'd at about 50 or a biy less if using a #25
> red filter.
> My question is,is the 3 stop difference the red
> filter has already included in this ISP calc of
> 50 or am i metering FOR 50 and stopping by 3 on
> top.
The suggestion to meter at 50 (and bracket!!) is
based on a handheld meter, which is to say the
filter compensation is already included in that
number. With TTL metering, rate it at 200. (For
some reason I always feel safer using a handheld
meter set for 50 than I do using a TTL meter set
at 200, but mathematically they ought to be the
same, and the results I got using an in-camera
meter looked pretty much like the results I got
with a handheld meter.)
-- Glenn
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