Pentax-FA 645 35mm f/3.5 AL [IF] AF Aspheric
This is the amazing Auto Focus Pentax 35mm Full Frame Super Wide Lens. It is the current model and it is among the finest Full Frame Super Wides ever made. It is not a fish eye. The 35mm FA is much sharper and with less light fall off than the original Pentax SMC P-A 645 35mm f/3.5 MF which it replaced. It outperfoms the Hasselblad 40mm IF FLE and the Mamiya 645 AF 35mm f3.5 in resolution tests. It works as an AF lens on the Pentax 645N and 645NII. It works as a Manual Focus Lens on the Pentax 645 MF.

SMC Pentax-FA 645 35mm f/3.5 AL [IF] AF - w/case
Angle of View:  90 Degrees
Lens Construction (group/elements)  7 groups 10 elements
Min. Aperture (f):  F32
Min. Focusing Distance:  0.3m
Diameter & Length (mm):  88mm x 90mm
Filter Size (mm):  82mm
Weight (g):  560
Model No.:  26910