RUSSIAN M42 SCREW MOUNT RANGEFINDER CAMERA 1:3.5/50mm LENS INDUSTAR-50-2 f= 50mm
Amazon.com : Large Aperture Lens, 50mm F1.7 Large Aperture Standard Focusing Silent Frame Lens, Black Optical Glass Camera Manual Lens, for M42 Mounting SLR Camera : Electronics
HIKROBOT AF5028M-M42 | RMA Electronics, Inc.
Pentax 50mm F/1.4 SMC Takumar M42 Screw Mount Manual Focus Lens {49} - Used Camera Lenses at KEH Camera at KEH Camera
rare Cyclop m4 F/1.2 50mm Lens fast bokeh M42 mount + macro rings | eBay
Fuji Fujinon 50mm 1.4 Lens Vintage SLR M42 Mount Camera - Etsy
Fuji Fujinon 50mm 1.4 Lens Vintage SLR M42 Mount Camera - Etsy