Nikon Nikkor AF 35-80mm f/4~5.6D
Nikomat FTN with mirror and diaphragm prefire

@ 50mm

Vignetting = A- @ f/4~5.6, A thereafter
Distortion = slight barrel

Aperture Center Corner
f/4~5.6  B      B-
f/5.6    B+     B-
f/8      B+     B
f/11     B      B
f/16     B-     C+
f/22     C      C+

Notes: Moderate contrast images at all apertures except f/5.6, where moderately high.