Pentax medium format 45mm lens for the 645  system. Precision Japanese manufacture gives super smooth manual focus operation.  Equivilent to a 28mm 35mm format lens so medium wide angle. Not too large for everyday use, very sharp and easy to focus. Perfect match for the 645N and NII. Comes with both lens caps.

Pentax-A SMC 645 MF 45mm F2.8 S#4022071