Looked up at Gary Reese test page: What does that mean, how do you do a
mirror and aperture prefire???
<< Zuiko lenses in this weight and length class need additional support, as
well as mirror and aperture prefiring, to attain their best results. >>
Copied from Gary Reese tests:
<<
200mm f/4 Zuiko (multi-coated)
Vignetting = A
Distortion = None
OM-4 with mirror and auto diaphram prefire, lens supported by a Bogen
Telephoto Lens Support
Aperture Center Corner
f/4 B B-
f/5.6 A- B+
f/8 A- B+
f/11 A A-
f/16 A A-
f/22 B+ B+
f/32 B B-
Notes: Apparently superior results versus using an OM-1 (see below). Zuiko
lenses in this weight and length class need additional support, as well as
mirror and aperture prefiring, to attain their best results.
>>
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