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Black Pentax HD DA 20-40mm f/2.8-4 Limited WR zoom lens with textured barrel and silver mount ring

PENTAX

PENTAX HD DA 20-40mm f/2.8-4 ED Limited DC WR Lens Black camera lens

SKU CH-130B-9CHZ9

Versatile 20-40mm zoom for APS-C K-mount cameras with ED glass and HD coating, covering wide-angle to portrait focal lengths in a compact 283g design

  • Exceptional clarity with ED glass minimizing chromatic aberration
  • Versatile 20-40mm zoom covering wide-angle to portrait
  • Beautiful background blur at f/2.8-4 maximum aperture
  • Compact 283g design ideal for travel and daily use
  • Weather-resistant construction for reliable outdoor shooting

Versatile 20-40mm Zoom for K-mount APS-C

This Pentax HD DA 20-40mm f/2.8-4 ED Limited DC WR lens is designed specifically for K-mount APS-C cameras. It covers a useful wide-angle to standard focal range, equivalent to 30.5-61.5mm in 35mm format. Photographers gain the flexibility of landscape and portrait perspectives in a single compact optic. It suits enthusiasts who want high-quality imaging without carrying multiple primes.

ED Glass and HD Coating Control Aberrations

The optical design incorporates ED (Extra-low Dispersion) and super-low dispersion glass elements to minimise chromatic aberration. Pentax-developed HD coating suppresses flare and ghosting for high-contrast results. This combination delivers clear, high-resolution images with edge-to-edge sharpness across the zoom range. It is the specification that determines whether the lens meets your image-quality requirements.

Lightweight Build with Weather Resistance

Weighing only 283g, the lens is built for comfortable all-day carrying and travel use. The DC WR designation confirms a built-in DC motor for autofocus and weather-resistant construction. Seals help protect against dust and moisture during outdoor shooting. Normal operation remains quiet and balanced on compatible APS-C bodies.

How it compares

Measured against everything we stock in Interchangeable Camera Lenses, at today’s prices. Recalculated every night.

Price $536.99
Typical for this category: the median of 2,570 items is $546.49.

Specifications

No published specifications for this item yet.

Questions about this item

How wide and how tight does the 20-40mm zoom go on an APS-C body?

On APS-C the lens covers 20-40mm, which equals a 30.5-61.5mm full-frame view — wide enough for landscapes and long enough for portraits.

What does the f/2.8-4 aperture range mean for exposure and depth of field?

The maximum aperture opens to f/2.8 at 20mm and narrows to f/4 at 40mm, so low-light capability and background blur decrease slightly as you zoom in.

Will this lens fit my Pentax K-mount camera and how heavy is it?

It mounts directly on any Pentax K-mount APS-C body and weighs 283 g (10 oz), making it light enough for all-day carry.

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