(auto focus, multi-coated)

OM-1 with mirror lockup

@ 35mm setting
Vignetting = B-
Distortion = barrel
Aperture Center Corner
f/4      B-     B-
f/5.6    B-     B-
f/8      B      B
f/11     B      B+
f/16     B+     B+
f/22     B      B
*Notes: Autofocuses on the OM-F.

@ 50mm setting
Vignetting = B-
Distortion = slight pincushion
Aperture Center Corner
f/4      C-     C+
f/5.6    B-     B
f/8      B-     B+
f/11     B      B+
f/16     B+     A-
f/22     B+     A-
Notes: Moderately low contrast.

@ 70mm setting
Vignetting = B
Distortion = slight pincushion
Aperture Center Corner
f/4      C+     B
f/5.6    B-     B
f/8      B-     B
f/11     B      B+
f/16     B      B+
f/22     B      B+