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Pentax DA 21mm Limited lens

From Wikipedia, the free encyclopedia
Pentax smc DA 21mm F3.2 AL Limited
MakerPentax
Lens mount(s)Pentax K
Technical data
TypePrime
Focus driveScrewdrive
Focal length21mm
Focal length (35mm equiv.)32mm
Aperture (max/min)f/3.2
Close focus distance0.20 metres (0.66 ft)
Max. magnification0.17
Diaphragm blades7
Construction8 elements in 5 groups
Features
Manual focus overrideYes Yes
Weather-sealingNo No
Lens-based stabilizationNo No
Aperture ringNo No
Physical
Max. length25 millimetres (0.98 in)
Diameter63 millimetres (2.5 in)
Weight140 grams (0.31 lb)
Filter diameter49mm
History
Introduction2006

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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