>>423028935mm f/2 ais
i was told this lens was "rare" and i owned it attached to a nikon f3 which i sold for 500 CAD. I personally hate the 50mm perspective.
picrel is from setup written above. not sure what film. I only shot 1 roll of film before selling the f3, wasn't a big fan of using it as much as i was a nikon fanboy.