The Pentax SMCP-FA 50mm f1.4 lens has a fully automatic diaphragm. At 1.5 inches long and weighing just 7.8 ounces, you can take this 50mm fixed focal length lens with you everywhere. You can use this lens with all Pentax SLR cameras, but the AF system only works with Pentax AF cameras.
Compact, standard lens- Extremely large 1.4 aperture allows extra-fast shutter speeds & wonderful depth of field control- Focal length equivalent to 75mm when used on a PENTAX(R) digital SLR camera body (1.5x crop factor)- PENTAX(R) super multi-coating for very low light loss- Compatible with all PENTAX(R) film & digital SLR cameras
