Leica M2 brand_Calumet with full manual or automatic

with full manual or automatic control and wireless functionality with compatible Nikon cameras and Speedlight flash units

It may also work with other brands

Pentacon Prakticar 135mm f2

That might sound (and look) weird

from the earliest manual focus models to the newest digital ones- so if you're looking for an "all purpose" lens and you've got a Pentax camera

Leica M2 brand_Calumet with full manual or automaticThere is a pretty good chance that you already know this, but the Leica M2 is a classic 35mm rangefinder camera compatible with Leica M mount lenses. This button rewind model is probably the cleanest of all the M2 designs, and still one of the best looking cameras out there [citation not needed]. Accurate shutter speeds and rangefinder focusing, some viewfinder fogging which reduces contrast very slightly but doesn't cause any issues in use. Cosmetic