Focal length 21mm | Focus drive Screwdrive Focal length (35mm equiv.) 32mm | |
 | ||
The Pentax smc DA 21mm F3.2 AL Limited is a moderate wide angle lens announced by Pentax on February 13, 2006. It is one of the five very compact "Limited" prime lenses for APS-C format cameras. Like its siblings, it was replaced in 2013 with a version that is HD-coated and has rounded aperture blades.
References
Pentax DA 21mm Limited lens Wikipedia(Text) CC BY-SA