Pentax DA 21mm Limited lens

Pentax smc DA 21mm F3.2 AL Limited
Technical data

Maker	Pentax
Lens mount(s)	Pentax K
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

http://www.dpreview.com/products/pentax/lenses/pentax_smc_da_21_3p2_ltd/specifications

Pentax K-mount lenses

DA*

Prime	DA* 55mm DA* 200mm DA* 300mm

Zoom	DA* 16-50mm DA* 50-135mm DA* 60-250mm

Prime	DA 14mm DA 35mm DA 40mm XS DA 50mm DA 560mm

Zoom	DA 10-17mm Fish-eye DA 12-24mm DA 16-45mm DA 16-85mm DA 17-70mm DA 18-50mm RE DA 18-55mm DA 18-135mm DA 18-250mm DA 18-270mm DA 50-200mm DA 55-300mm

DA Limited

Prime	DA 15mm Limited DA 21mm Limited DA 35mm Macro Limited DA 40mm Limited DA 70mm Limited

Zoom	DA 20-40mm Limited

D FA and D FA*

Prime	D FA 50mm Macro D FA 100mm Macro D FA 100mm Macro WR

Zoom	D FA 24-70mm D FA* 70-200mm D FA 150-450mm

FA Limited

FA*

Prime	FA* 24mm FA* 85mm FA* 200mm FA* 200mm Macro FA* 300mm FA* 400mm FA* 600mm

Zoom	FA* 28-70mm FA* 80-200mm FA* 250-600mm

FA and FA J

Prime	FA 20mm FA 28mm FA 28mm Soft FA 35mm FA 50mm FA 50mm Macro FA 85mm Soft FA 100mm Macro FA 135mm

Zoom	FA J 18-35mm FA 20-35mm FA 24-90mm FA 28-70mm FA 28-80mm FA J 28-80mm FA 28-90mm FA 28-105mm FA 28-200mm FA 35-80mm FA 70-200mm FA J 75-300mm FA 80-200mm FA 80-320mm FA 100-300mm

F and F*

Prime	F 28mm F 50mm F 85mm F 100mm Macro F 135mm F* 300mm F* 600mm

Zoom	F 17-28mm Fish-eye F 24-50mm F 28-80mm F 35-70mm F 35-80mm F 35-105mm F 35-135mm F 70-210mm F 80-200mm F 100-300mm F* 250-600mm

A and A*

Prime	A 15mm A 16mm Fish-eye A 20mm A 24mm A 28mm A 35mm A 50mm A 50mm Macro A* 85mm A 100mm A 100mm Macro A 135mm A* 135mm A 200mm A* 200mm A* 200mm Macro A* 300mm A 400mm A* 400mm A* 600mm A* 1200mm

Zoom	A 24-50mm A 28-80mm A 28-135mm A 35-70mm A 35-80mm A 35-105mm A 35-135mm A 35-210mm A 70-210mm A 80-200mm

M and M*

Prime	M 20mm M 28mm M 35mm M 40mm M 50mm M 50mm Macro M 85mm M 100mm M 100mm Macro M 120mm M 135mm M 150mm M 200mm M* 300mm M 400mm

Zoom	M 24-35mm M 24-50mm M 28-50mm M 35-70mm M 40-80mm M 75-150mm M 80-200mm

Special

DA 1.4× Rear Converter
AF 35-70mm (for ME F)

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