Sorry if this has been discussed before.
I got into an email discussion with a guy who writes books on one of
those other camera brands and mentioned Gary Reese's discovery that the
same OM lens on an OM1 with mirror lockup tested significantly less
sharp than an OM4T with the self timer which flips the mirror and
closes the aperture at the beginning of the timer cycle. I was
wondering whether the cameras he wrote about did an early aperture shut
down too. He said he did not know, but that would be easy to test. Just
do one shot wide open when aperture shut down does not function and one
shot at f16, say.
That astounded me and I went back to Gary's lens test page and sure
enough the differences occurred even wide open. I know Gary was very
careful in doing his tests, so I was wondering what other mechanism
could be causing the softer results with the OM1. Maybe Olympus did
some shutter refinements that damped things better when they designed
the OM4? Or is it the aperture activation lever inside the camera
itself? Less of a problem perhaps on an electronically activated
aperture?
Winsor
Long Beach, California, USA
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