|   | |
| Maker | Pentax | 
|---|---|
| Lens mount(s) | Pentax K | 
| Technical data | |
| Type | Prime | 
| Focus drive | Screwdrive | 
| Focal length | 21mm | 
| Focal length (35mm equiv.) | 32mm | 
| Aperture (max/min) | f/3.2 | 
| Close focus distance | 0.20 metres (0.66 ft) | 
| Max. magnification | 0.17 | 
| Diaphragm blades | 7 | 
| Construction | 8 elements in 5 groups | 
| Features | |
| Manual focus override |  Yes | 
| Weather-sealing |  No | 
| Lens-based stabilization |  No | 
| Aperture ring |  No | 
| Physical | |
| Max. length | 25 millimetres (0.98 in) | 
| Diameter | 63 millimetres (2.5 in) | 
| Weight | 140 grams (0.31 lb) | 
| Filter diameter | 49mm | 
| History | |
| Introduction | 2006 | 
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.
 Media related to  SMC Pentax-DA 21mm F3.2 Limited  at Wikimedia Commons
  Media related to  SMC Pentax-DA 21mm F3.2 Limited  at Wikimedia Commons