Pentax HD DA 20-40mm F/2.8-4 ED DC WR Limited Lens

Weatherproof - Seals protect from dust, humidity and light splashing.Weatherproof - Seals protect from dust, humidity and light splashing.Zoom LensZoom LensRectilinear are normal lenses that show straight lines as straight lines.Rectilinear are normal lenses that show straight lines as straight lines.Thread size in milimeters for screw-on filters.Thread size in milimeters for screw-on filters.55Quick-Shift Autofocus, also called Direct Manual-Focus (DMF).Quick-Shift Autofocus, also called Direct Manual-Focus (DMF).

Lens Description

The Pentax HD DA 20-40mm F/2.8-4 ED DC WR Limited is a wide to normal zoom designed for cameras with a APS-C (1.5X) sensor. This bright variable-aperture zoom covers a 20 to 40mm focal-range. It provides the same field of view as a 30-60mm lens on a Full-Frame camera.

This 2X zoom lens focuses down to 28cm from the imaging plane, capturing subject with a maximum 0.2X magnification. The lens offers a Quick-Shift AF system which lets the user simply rotate the focus-ring to focus manually. A built-in focus motor is used to set the focus-distance. It allowed Pentax to optimize the motor precisely for this lens in order to maximize performance.

The lens weighs 283g. Its body is weatherproof against adverse weather such as rain and snow. Seals in key areas prevent entry of water and dust.

This lens is only available for the Pentax K mount. It directly attaches and is fully compatible with all Pentax K mount cameras with APS-C (1.5X) sensors.

Pentax HD DA 20-40mm F/2.8-4 ED DC WR Limited
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Pentax HD DA 20-40mm F/2.8-4 ED DC WR Limited

Focal-Range

11mm560mm
20-40mm
FOCAL-RANGE OF WEATHERPROOF Pentax K MOUNT LENSES WITH AT LEAST APS-C (1.5X) COVERAGE

Angle-Of-View

2.9°126°
39-70°
ANGLE OF VIEW OF WEATHERPROOF Pentax K MOUNT RECTILINEAR LENSES WITH APS-C (1.5X)+ COVERAGE

Maximum Aperture

1.45.6
2.8-4
MAXIMUM APERTURE OF WEATHERPROOF Pentax K MOUNT LENSES WITH AT LEAST APS-C (1.5X) COVERAGE

Viewing Angle Range

Pentax 20-40mm F/2.8-4

Maximum Aperture

Compared to other Pentax K APS-C (1.5X) lenses.
39-70°
Max F/2.8-4

Magnification

0.07X5X
0.2X
MAGNIFICATION OF Pentax K MOUNT LENSES WITH AT LEAST APS-C (1.5X) COVERAGE

Weight

155g3040g
283g
WEIGHT OF WEATHERPROOF Pentax K MOUNT LENSES WITH AT LEAST APS-C (1.5X) COVERAGE

Pentax HD DA 20-40mm F/2.8-4 ED DC WR Limited Specifications

Brand Pentax Model HD DA 20-40mm F/2.8-4 ED DC WR Limited
Mount Pentax K Max FLM 1.5X
Focal Range 20 - 40mm View Angle 70 - 39°
Max ApertureF/2.8 - 4Min ApertureF/22 - 32
Min Focus28cmMagnification0.2X
Filter Size55mm Aperture Blades9
Size (D x L)71 x 69mm Weight283g
TiltN / A ShiftN / A
Stabilization ProtectionWeatherproof
Zoom Drive Mechanic Focus Drive AF with Quick-Shift
Zoom Mechanism External Focus Mechanism Internal
Hood Bayonet Focus Motor Internal
Perspective RectilinearIntroduced2013-11-06

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Pentax 20-40mm F/2.8-4 Facts

Pentax HD DA 20-40mm F/2.8-4 ED DC WR Limited
Weatherproof - Seals protect from dust, humidity and light splashing.Weatherproof - Seals protect from dust, humidity and light splashing.Zoom LensZoom LensRectilinear are normal lenses that show straight lines as straight lines.Rectilinear are normal lenses that show straight lines as straight lines.Thread size in milimeters for screw-on filters.Thread size in milimeters for screw-on filters.55Quick-Shift Autofocus, also called Direct Manual-Focus (DMF).Quick-Shift Autofocus, also called Direct Manual-Focus (DMF).
20-40mm Focal-Range F/2.8-4 Max Aperture
55mm Filter Thread AF with Quick-Shift
Pentax K Mount APS-C (1.5X) Coverage
283g Lens Weight 71 x 69mm (D x L)
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