Wayne H. writes:
<< She was sitting in a chair quite still and I was able to focus quite
accurately (so I thought) on her eyelashes, lighting was with T32
bounced from an umbrella. Film was Kodak Portra 160NC, body OM-2SP with
1-4 screen, aperture f2.8 for each lens. When I got the film back about
1/4 to 1/3 showed incorrect focus, with the area of sharpest focus not
the eyelashes.
So how do you achieve "correct" focus ? >>
Next time repeat the test with a 2-4 screen and the proper dioptric
correction for the eye you favor for focusing. If you still encounter
the problem, try a different body. Worse case scenerio: you'd have to
ditch (or get adjusted) the present body.
A 2-4 screen and proper dioptric correction makes the OM-2S to OM-4Ti
family the easiest to manually focus cameras I've ever encountered (and
I see lots of them).
FWIW, the earliest OM-1 based SQF tests that I did might not have been
with proper dioptric correction. Likewise, they were with a split image
screen focused via the biprism image. I might have missed the mark (even
with a Varimagnifinder), which would explain why a f/11 result would
exceed an f/8: depth of field "corrects" the misfocus.
Gary Reese
Las Vegas, NV
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