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| Manufacturer | Pentax | Carl Zeiss | Canon | Nikon Nikkor | Sony |
|---|---|---|---|---|---|
| Model | smc DA 21 mm f/3.2 AL Limited | Distagon T* 21 mm f/2.8 ZE/ZF/ZK | EF 20 mm f/2.8 USM | AF 20 mm f/2.8D | 20 mm f/2.8 |
| Lenst style | Wide angle | Wide angle | Wide angle | Wide angle | Wide angle |
| Focal length | 21 mm | 21 mm | 20 mm | 20 mm | 20 mm |
| Maximum aperture | f/3.2 | f/2.8 | f/2.8 | f/2.8 | f/2.8 |
| Angle of view | 68 o | 91.7 o | 94.5 o | 94 o | 94 o |
| Closest focusing distance | 0.2 m | 0.22 m | 0.25 m | 0.25 m | 0.25 m |
| Maximum magnification | 1:5.88 | 5 | 1:7.14 | 8.3 | 1:7.69 |
| Minimum aperture | 22 | 22 | 22 | 22 | 22 |
| Diaphragm blades | 7 | 0 | 5 | 7 | 7 |
| Auto focus type | AF | MF | USM | AF | AF |
| Lens Construction | 8 elements / 5 group | 16 elements / 13 group | 11 elements / 9 group | 12 elements / 9 group | 10 elements / 9 group |
| Filter diameter | 43 mm | 82 mm | 72 mm | 62 mm | 72 mm |
| Macro Yes/No | No | No | No | No | No |
| Stabilization | No | No | No | No | No |
| Available mounts | Pentax K | Canon EF Nikon F Pentax K |
Canon EF | Nikon F | Sony A / Minolta |
| Dimensions | 63 x 25 mm | 108 x 97 mm | 77.5 x 70.6 mm | 42.5 x 69 mm | 78 x 53.5 mm |
| Weight | 140 g | 600 g | 405 g | 270 g | 285 g |
| Additional information | can be used with 43mm and 49mm filters | Marketed June 1992 | Marketed 1994 | ||
| Score [max 5.00] | No score | ||||
| Our Review |
LensTip.com
