Auto Mamiya/Sekor 50 mm f/ 2.8 - normal lenses with single-layer coating for a 35mm SLR with m42 mount.
According camerapedia.wikia.com, this lens belongs to the first series of Mamiya lenses with M42 mount, which was produced for Mamiya TL / DTL cameras. The series also included the following lenses:
50mm f/2.0 (TL / DTL-I / DTL-II)
60mm f/2.8 Macro
135mm f/2.8 (TL / DTL)
200mm f/3.5 (I / II / III)
These lenses was sold under the Sears brandname also.
Posted by: Web walker Date of publication: 12.04.2013