Are you comparing the 90/2 to other, slower lenses of about equal focal
length, or to shorter FLs? The DOF is only dependent on the FL and
f-stop (once film size, circle of confusion, etc. are chosen). The DOF
of the 90/2 at f11 is the same as a 90/f8 lens at f11 (if such a thing
existed). The selective use of f-stop to control DOF is one of the
creative tools of photography. A faster lens simply gives the
photographer more choices of DOF than a slower one (assuming sufficient
light/film speed).
Moose
Brian Swale wrote:
<>What I found that I didn't like is in the images. For example, a couple of
shots I took of people playing chess in the square with those huge chess
pieces; I stood well back and focussed on the central player or two. They
were in focus but nothing else was. I think the whole image fails as a result.
Use the DOF button and/or scale to check what you are going to get.
When I photographed the Town Crier resplendent in red and gold, he was
standing well away from most other people so the lens worked well for him;
he stood out alone anyway, and the shallow DOF just accentuated what was
there in the first place.
Maybe I need to practice using this selective focus for these kinds of shot
(which I very seldom take, by the way - it's not a kind of photography that
interests me). But this day, I needed a lens with greater DOF.
No such thing exists at the same focal length. Gotta stop down. If you
use a shorter lens and the same size print, it will appear to have more
DOF, but if the image is enlarged to the same magnification on the
print, the DOFs will be the same. No free lunch, I'm afraid.
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