Keith Green wrote:
> Assumption:
> It is how Canon have set up their database for Evaluative metering.
> After all, if it's much brighter than Sunny 16, then it's bright.
Ok; I can see how, in theory, the meter might take into account a meter reading
that gives an exposure that varies significantly from average for a given ISO
setting. Perhaps this is what happens when we notice that in evaluative mode
less compensation is needed than we had thought. Nonetheless, it has been my
experience that snow (for example) still needs about +1 compensation even when
light is fairly dim (just after sunset, for example); and recently I was working
with some beginners who, without applying compensation to their Rebel 2000s (EOS
300), were getting consistent underexposure at the beach and at a playground
with a sand "floor." BUT, my estimation of how much compensation is necessary is
often imperfect, and when applying compensation I often bracket (manually),
especially when shooting slides. And there's no substitute for experience. For
example, when my "students" applied compensation as I suggested, they tended to
just blindly dial in +1--the value I had mentioned for snow scenes--and hence
ran into overexposure at the beach; they haven't yet the experience necessary to
be able to estimate in advance how much compensation they might need.
Interestingly, the one who was using a Nikon N65 tended to get better exposures
in difficult light than did the Rebel users.
> Where I live, Worcester, which is vaguely left of centre in England we never
> see much snow anyway, just plenty of rain, although at the moment we are
> experiencing a bit of a heat-wave.
> See, a typical Englishman talking about the weather :-)
Yes, well we do it here too--at least I do, since many of my correspondents live
in quite different climates from mine (New Mexico, Oslo, Sydney). As it is, I
live less than two hours from Worcester, Mass., and while last week New England
had something of a heat wave also, it's currently a much more reasonable 23�C
this afternoon, and it looks like we're not likely to break 27�C anytime soon.
:-) Lot's of blue sky and big puffy clouds . . . what am I doing inside??
Craig
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