Tom Rittenhouse wrote:
>
> Bill is correct, up to a point. Many SLR lenses have scales
> based on 5x7 prints. For each size larger using the mark for the
> next larger aperture works well. OTOH, the human eye can
> perceive a dot (circle of confusion) only so small, a smaller
> dot is not visible. DOF is based on that size dot. So, trying to
> get deeper DOF than that is an exercise in futility. But, as
> always people will believe more is better even if it isn't.
I agree w/ you as to limits of the eye, etc. However, when I
mention large prints I'm speaking >16x When this is the end
product every little bit (of anything beneficial) helps. I do
prefer my old 6x9cm folder for big stuff, but it is saddled
w/ a fixed 105mm ("normal") lens and I do have a penchant for
wides & teles ;^)
Bill
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Bill D. Casselberry ; Photography on the Oregon Coast
http://www.orednet.org/~bcasselb
[EMAIL PROTECTED]
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