Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens - Silver

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  • Regular price $989.00

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The Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens is the first zoom lens of the high-grade Limited Lens series, which is renowned for its exceptional visual description, distinctive appearance and meticulous finish in every detail. It features a two-times zoom range covering focal lengths from moderate wide angle to standard, and a large maximum aperture of F2.8 at its wide-angle end. In addition to the state-of-the-art HD coating and completely round-shaped diaphragm, it also comes equipped with a weather-resistant construction for the first time in the Limited Lens series, and a smooth, quiet AF system driven by a lens-installed AF motor, to capture beautiful, high-quality images, even under demanding weather and environmental conditions.

  • Equivalent to 30.5-61.5mm in 35mm
  • Dependable weather-resistant construction
  • Lens-installed AF driving motor 
  • Quick-Shift Focus System
  • High Definition Coating 
  • Round shaped diaphragm
  • Choice of black or silver colour


The first two-times zoom lens of the Limited Lens series
With its two-times zoom coverage from 20mm to 40mm, the Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens offers a focal-length coverage from 30.5mm to 61.5mm (in the 35mm format) when mounted on a Pentax K-series lens-interchangeable digital cameras body. It provides the most frequently used focal lengths required for many popular applications, such as scenic photography, snapshots and portraiture, making it the ideal choice as an all-purpose, everyday lens.

Acclaimed Limited Lens-series quality for superb visual description and premium appearance
Inheriting the design concept of the Limited Lens series, the Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens is designed with an optical construction that faithfully reproduces the feeling of depth while minimizing astigmatism over the entire zoom range. It allows the photographer to optimize the subject’s visual description, by making its appearance softer at larger apertures and sharper at smaller apertures. Its lens barrel, hood and cap are made of a high-grade aluminum material, and hand-machined for perfect proportions and beautiful texture. Positioned in the mid-section of the lens barrel, the zoom ring features a series of knurled grooves to facilitate zooming operation.

State-of-the-art optical technology
The lens has been treated with the Pentax-developed HD coating, a high-grade, multi-layer coating that reduces reflectance in the visible light spectrum to less than 50 percent of that of conventional multi-layer coatings. This allows the user to capture crisp, high-contrast images free of flare and ghost images, even under such adverse lighting conditions as backlight. The Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens also incorporates an ED (Extra-low Dispersion) glass and a super-low-dispersion glass element in its optics to deliver clear, high-resolution images with edge-to-edge sharpness, while effectively compensating for chromatic aberrations over the entire zoom range.

The first weather-resistant lens in the Limited Lens series
The Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens is the first Limited Lens-series model to feature a weather-resistant construction, with seven special seals to prevent the intrusion of water and moisture into the lens interior. By mounting it on a Pentax weather-resistant digital SLR camera body, the user is assured of greater durability and reliability when shooting in the rain or mist, as well as at locations subject to spray or splashes.


Focal length 20-40mm
Equivalent to 35mm format 30.5-61.5mm
Maximum aperture F2.8-4
Minimum aperture F22-32
Number of diaphragm blades 9; rounded aperture (20mm: F2.8-4   40mm: F4-5.6)
Angle of view 70-39° 
Construction 9 elements en 8 groups
Smallest object distance 0.28m
Magnification 0.20x
Filter size 55mm
Mount KAF3
Weight Approx. 283 g  
Dimensions (Length x Diameter) Approx. 68.5mm x 71mm
Kit content Lens hood MH-RA55
Lens cap O-LW65A
Lens case P70-150
Special features Weather Resistant
HD Coating
SP (Super Protect) Coating
Quick-shift Focus System

Box Contents

  • Pentax HD DA 20-40mm F2.8-4 ED Limited DC WR Lens - Silver
  • Lens Hood MH-RA55
  • Lens Cap O-LW65A
  • Lens Case P70-150