Pentax DA 21mm Limited lens

Pentax smc DA 21mm F3.2 AL Limited
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 / 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.

References

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