Leitz Tele-Elmar 135mm f4 lens mount_Mamiya 7 but honestly you can use

but honestly you can use it for pretty much whatever you'd like

The Asahi 100mm f4 Super-Multi-Coated Macro-Takumar is a good quality macro lens for the M42 thread mount

with a working AF system

I should point out that the $14

and small dings

Leitz Tele-Elmar 135mm f4 lens mount_Mamiya 7 but honestly you can useThe Leitz Tele Elmar 135mm f4 is a telephoto lens for the Leica M mount. Kind of an awkward focal length to use with a rangefinder, not gonna lie, but quality is excellent. Just back from a complete CLA and in excellent condition, with minor cosmetic wear, smooth focusing, and clean glass. Includes rear and (non original) front cap.