Tokina 80-200mm f/2.8 AT-X
OM-4T with mirror and diaphragm prefire

@ 80mm
Distortion: moderate barrel
Vignetting: B @ f/2.8, A elsewise
Aperture Center Corner
f/2.8    B+     B-
f/4      B      B
f/5.6    B+     B
f/8      A-     A-
f/11     A-     B
f/16     A-     A
f/22     B+     A-
f/32     C      B
Notes: Moderate contrast throughout.

@ 120mm
Distortion: very slight waveforming with no tendency
Vignetting: B @ f/2.8, A- @ f/4 to f/5.6, A @ f/8
Aperture Center Corner
f/2.8    C      C+
f/4      A-     B
f/5.6    B+     B+
f/8      A      A-
f/11     A-     A-
f/16     A-     B+
f/22     A-     B+
f/32     B      B
Notes: Moderate contrast.

@ 200mm
Distortion: None
Vignetting: B @ f/2.8, A- @ f/4, A @ f/5.6
Aperture Center Corner
f/2.8    B+     B
f/4      A-     B
f/5.6    A-     B+
f/8      B+     B+
f/11     A-     B
f/16     A      B
f/22     B      B
f/32     B-     B
Notes: Moderately high contrast throughout.