HD Pentax-DA 20-40mm F2.8-4 ED Limited DC WR
MakerRicoh Imaging
Lens mount(s)Pentax KAF3
Technical data
TypeZoom
Focus driveBrushless DC motor
Focal length20-40mm
Aperture (max/min)f/2.8 - f/4.0
Close focus distance0.28 metres (0.92 ft)
Max. magnification0.2
Diaphragm blades9
Construction9 elements in 8 groups
Features
Manual focus overrideYes Yes
Weather-sealingYes Yes
Lens-based stabilizationNo No
Aperture ringNo No
Physical
Diameter71 millimetres (2.8 in)
Weight283 grams (0.624 lb)
Filter diameter55mm
Accessories
Lens hoodMH-RA55
History
Introduction2013

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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