Nikkor 24mm 2.8 AI
I have one bought mostly for use with 52mm filters like 400X ND hoya
and IR . It's a nice lens with sharp center and quite sharp corners
if you focus on them. Otherwise the field curvature never allows
both center and corners to be sharp. The FC is negative at infinity
meaning that corners are more distant than center. I had noticed that
to get a sharp corner at infinity the lens should be focused at
about 10 meters (at 2.8). At 10 meters the center is not very sharp even if you stop down. Keep that in mind. At closer distances it does better. Otherwise a sweet lens but not
something special. Color is so-so, contrast is quite low, bokeh so-so.
Color and contrast against the 24 1.4 is day and night difference.