>From: "Jeff Keller" <jrk_om@xxxxxxxxxxx>
>
>Focal length just changes the size of the image. There is no change in
>the relative size and placement of objects (perspective)...
But that's the taker's point-of-view. I try to teach students to think in terms
of the subject.
>Probably the difference in what you're saying is semantics rather than a
>difference in understanding (which I'm pretty good at confusing).
I'd call it more a difference in attitude.
You are, of course, correct in saying that perspective doesn't change if the
camera-subject distance is unchanged. But (IMHO) that's a rather trivial use of
focal length, in most cases. (Yea, the "getting closer" part of focal length is
handy for shooting birds and large carnivores... :-)
I devote a whole unit in my class to having students get used to using focal
length to alter perspective. They already know how to stand in one place and
twist the zoom ring! :-)
--
: Jan Steinman -- nature Transography(TM): <http://www.Bytesmiths.com>
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