I dunno, Bill. To me, one of the main advantages of an slr over a rangefinder
camera is that you see (almost) exactly what the film sees. Including dof when
you stop down.
You're right that doing it "by the numbers" is a good exercise, and good to know
how to do, but nothing beats seeing it through the viewfinder, imho.
As far as the darker viewfinder making viewing the image "relatively worthless",
I've used bodies with stop-down metering exclusively for the past 30 years or so.
I guess if I can get used to it, anyone can! :-)
regards,
frank
"Bill D. Casselberry" wrote:
> Well, the "student" *should* learn DOF "by the numbers", as in
> via a DOF scale on the lens and/or a DOF chart. This will give
> him/her an innate sense of DOF at various aperture/focal length
> combos and effectively negate the "need" for the convenience of
> a preview function (which usually so darkens the viewfinder as to
> be relatively worthless).
>
> ... just some thoughts from a guy who learned DOF from books and
> hands-on experience w/ old 6x6 folders and rangefinders ;^)
>
> Bill
>
>
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