The smc PENTAX-DA 21mm F3.2AL Limited is an interchangeable uni-focal wide-angle lens for exclusive use with PENTAX digital SLR camera bodies. Offering wide-perspective coverage with a 68-degree angle of view (equivalent in focal length to 32mm in the 35mm format, when mounted on a PENTAX digital SLR camera body), the lens features a PENTAX-original KAF lens mount.
Specifications:
| Construction | 8 elements in 5 groups |
| Angle of view | 68 degrees |
| F stop range | f/3.2-22 |
| Closest Focusing Distance | 7.9 inches (0.2m) |
| Maximum Magnification | 1:5.8 |
| Filter Size | 43mm or 49mm |
| Dimensions (Length x Diameter) | 1.0 inches (25mm) x 2.5 inches (63mm) |
| Weight | 4.9 oz. (140g) without hood; 5.5 oz. (155g) with hood |
| Notes | Diaphragm: Fully automatic
Photometric Method: TTL open-aperture metering |
