Pentax Super Multi Coated Takumar 28mm f/3.5 - M42 Mount

Pentax Super Multi Coated Takumar 28mm f3.5 Manual Focus Lens This is a compact lens of about 2 inches in height and about 1.5 inches in diameter. The aperture adjusts from f/3.5 to f/16 with half stop There is an Auto/Manual switch just above the lens mount which sets the lens to automatic or manual operation. Also, for use with Sony Nex E-Mount Cameras with and adapter, set this to M and just adjust the aperture appropriately. Takumar Super Multi Coated 28mm 1:3.5 Focal length 28mm Effective focal length on APS-C 42mm Maximum aperture f/3.5 Minimum aperture f/16 Mount M42 screw thread 49mm filter thread