Nikon Series E 50mm f1.8 lens mount_Mamiya NC but you'll need to use

but you'll need to use the included external viewfinder to frame your shot (it's too wide for the camera viewfinder)

Works on most EF cameras and many EF lenses

It won't hold the Contarex

Leitz HOOKI Blue filter for 35/50mm Summicron lenses and others with a 39mm filter thread

with smooth mechanical action and good bellows

Nikon Series E 50mm f1.8 lens mount_Mamiya NC but you'll need to useThe Nikon Series E 50mm f1. 8 lens is a compact almost pancake lens (french toast lens?) with a fast f1. 8 aperture. It is compatible with film and digital Nikon F mount cameras (though function will vary). In excellent condition, with minor cosmetic wear, minor internal dust, smooth focusing and good diaphragm action.