The silver HD Pentax DA 20-40mm f/2.8-4 ED Limited DC WR Lens from Pentax is a high performance standard length zoom lens for K-mount APS-C cameras. Its 35mm focal length equivalency is 30.5-61.5mm providing a versatile and practical range for wide-angle to standard length shooting. It is the first zoom lens in the Pentax Limited Series line and brings with it a durable, weather-sealed body, HD lens coating and an optical design consisting of one ED element and one super-low dispersion element.
The f/2.8-4 maximum aperture enables effective low light shooting and, at the wide-angle end, control over its shallow depth of field for images that place sharp focus on the subject with a pleasing out of focus background. An in-lens direct current (DC) focus motor provides smooth and quiet autofocus action and its Quick-Shift Focus System enables rapid shift from autofocus to manual focus mode.
The lens barrel and the included hood are made from high-grade aluminum alloy, distance and depth of field scales are clearly marked on the barrel and a smooth rotating, knurled ring provides manual focus control. SP (Super Protect) coating on the front and rear lens elements repels dust, water and grease to help maintain peak performance.
|Focal Length||20 - 40mm
Comparable 35mm Focal Length: 30.5 - 61.5 mm
|Aperture||Maximum: f/2.8 - 4
Minimum: f/22 - 32
|Camera Mount Type||Pentax K|
|Format Compatibility||Pentax Digital (APS-C)|
|Angle of View||70° - 39°|
|Minimum Focus Distance||11.02" (28 cm)|
|Filter Thread||Front:55 mm|
|Dimensions (DxL)||Approx. 2.80 x 2.72" (71 x 69 mm)|
|Weight||9.98 oz (283 g)|
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