Mark's Mamiya Sekor SX 50mm F2 M42-mount lensBought SN 115926 on 2-1-23 with the Mamiya Sekor MSX 500 camera, from a Goodwill auction. Has a M42 lens mount. The focus ring is skippy, you can feel it lose traction when turning. Has a bent filter front lens, was it dropped? You can see damage to the focus ring. Appears to work. Probably should go in the junk box.
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