Here is a preview of a multi-coated 24mm f/2.8
24mm f/2.8 Zuiko (multi-coated)
OM-4T with mirror and aperture prefire
Vignetting = B- @ f/2.8, B+ @ f/4, A- @ f/5.6, A @ f/8
Distortion = slight waveforming with distinct barrel
Aperture Center Corner
f/2.8 B- C
f/4 B+ B
f/5.6 A- A-
f/8 A- A
f/11 A- A
f/16 A- A-
Note: Moderately low contrast at f/2.8 and f/16, moderate contrast
elsewise.
The most noticable difference between this and the H.Zuiko is the more
pronounced distortion in the multi-coated version. There might have
been an optical redesign associated with the release of the multi-coated
version - although that will require testing another example.
Gary Reese
Las Vegas, NV
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