(multi-coated shift-lens)

@ no offset

Distortion = slight barrel
Vignetting = A- @ f/3.5, A @ f/5.6
Aperture Center Corner
f/3.5    C      B-
f/5.6    B      B+
f/8      A-     A-
f/11     A-     B+
f/16     B+     B+
f/22     B      B+
Notes: Moderately low contrast at f/3.5, moderately high elsewise.

@ maximum offset
Distortion = none
Vignetting = C+ @f/3.5 (in upper corners), A- @ f/5.6, A @ f/8
Aperture Center Corner
f/3.5    C      B-
f/5.6    B      B+
f/8      A-     A-
f/11     A-     B+
f/16     B+     B+
f/22     B      B+
Notes: Moderately high contrast, except moderate at f/3.5