Minolta MD 45mm f/2 Rokkor-X (plastic body)
X-700 w/ self-timer
Vignetting = C+ @ f/2, B+ @ f/2.8, A thereafter
Distortion = none
Aperture Center Corner
f/2      C      C-
f/2.8    B      C+
f/4      B      B
f/5.6    B      B+
f/8      B+     B+
f/11     A-     A-
f/16     A-     A-
Notes: Moderately low contrast at f/4 and f/16, moderate contrast at f/2-2.8 and f/5.6-f/11.