Pentax medium format 150mm lens for the 645  system. Precision Japanese manufacture gives super smooth manual focus operation.  Equivilent to a 90mm in 35mm format, so this  lens is considered a short telephoto/portrait medium format lens.. Quite a bulkylens for everyday use butvery sharp and easy to focus. Excellent for general landscape and single feature work. Matchs well with the 645N and NII. Has built in pull out lens hood and comes with both lens caps.