Pentax DA 20-40mm Limited lens

HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR
Maker Ricoh Imaging
Lens mount(s) Pentax KAF3
Technical data
Type Zoom
Focus drive Brushless DC motor
Focal length 20-40mm
Aperture (max/min) f/2.8 - f/4.0
Close focus distance 0.28 metres (0.92 ft)
Max. magnification 0.2
Diaphragm blades 9
Construction 9 elements in 8 groups
Features
Manual focus override  Yes
Weather-sealing  Yes
Lens-based stabilization  No
Aperture ring  No
Physical
Diameter 71 millimetres (2.8 in)
Weight 283 grams (0.624 lb)
Filter diameter 55mm
Accessories
Lens hood MH-RA55
History
Introduction 2013

The HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR is an advanced standard zoom lens for Pentax APS-C DSLR cameras announced by Ricoh on November 6, 2013. Being part of Pentax's Limited series, it features a metal barrel and a comparably small form factor. Within the Limited series, it is the first zoom lens as well as the first lens to feature a silent built-in autofocus motor (DC) and weather resistance (WR).

References

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