Nikon Nikkor 35mm f/2 Non-AI
Nikon F3 with mirror and diaphragm prefire

Vignetting = C @ f/2, B @ f/2.8, A thereafter
Distortion = slight waveforming with no tendency

Aperture Center Corner
f/2      C      C
f/2.8    B      C+
f/4      A      B-
f/5.6    A+     B
f/8      A+     B+
f/11     A      B+
f/16     A      A-

Notes: Moderate contrast images at f/2 and f/2.8; moderately high contrast images at f/4 and f/16; very high contrast images in center and mederately high contrast images in corners at f/5.6 to f/11.