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Reviews about this item

Review Summary

2021-09-17T10:55:06

Rated 5 out of 5

Pentax 20 - 40mm F- 2.8-4 Lens

Great lens. It's now my go to lens. The images are sharp and the colors are wonderful. I recommend this lens.

VAN W.

2021-09-03T10:42:43

Rated 5 out of 5

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

This a great lens! I can take great photo's using this lens. It is perfect for taking closeup's of flowers.

J A.

2021-07-23T11:49:14

Rated 4 out of 5

Pentac HD DA 20-40mm F 2.8/4 Limited DC WR Zoom len- Silver

It is good product

KIM L.

2019-02-15T11:17:22

Rated 5 out of 5

impressive lens

Agree with earlier reviewers in all regards. Extremely sharp and contrasty and as quiet as billed. CA and fringing on my copy is noticeable at the long end but easily corrected, and is surprisingly low at the short end, unlike my 16-50 DA* which has the worst CA at the short end. I'm not getting rid of the 16-50 (it's a very good specimen) but for travel or any time weight is an issue I will be happy to take the 20-40 instead.

LOUIS S.

2016-08-19T07:58:25

Rated 5 out of 5

Excellent lens

Excellent lens got it to replace my 16-45 mainly because of weather sealing but after using found it to be much sharper than my 16-45. Great color very light and small.

ERICK A.

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Pentax 20-40mm Specifications

General

General

Jump to...
  • Brand

    Pentax

  • MPN

    23010

  • Lens Series

    Pentax DA

  • Color

    Black

  • Lens Type

    Wide Angle To Standard Zoom

  • Lens Mount

    Pentax K

  • Format Compatibility

    APS-C / DX

  • Focus Type

    Auto Focus

  • Focusing Technology

    N/A

  • Closest Focus Distance

    10.8" / 27cm

  • Distance Information

    N/A

  • Built-In Motor

    N/A

  • Focal Length

    20-40mm

  • Angle Of View

    39 -70 deg.

  • 35mm Equivalent Focal Length

    30.5-61.5 mm

  • Coverage

    N/A

  • Minimum Aperture

    f/22 - 32

  • Maximum Aperture

    f/2.8-4

  • Maximum Magnification

    0.17x

  • Lens Coating

    N/A

  • Aspherical Elements

    N/A

  • ED Glass Elements

    Yes

  • Filter Size

    55mm

Construction

Jump to...
  • Lens Elements / Groups

    9 Elements / 8 Groups

  • Diaphragm Blades

    N/A

  • Dimensions

    2.8" x 2.7 (71.0 x 68.5mm)

  • Weight

    10oz / 283g

Features

Jump to...
  • Image Stabilization Type

    None

  • Tripod Collar

    Yes

  • Waterproof / Water Resistant

    N/A

  • Dust Resistant

    N/A

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

FEATURED REVIEWS

impressive lens

By LOUIS S.

Agree with earlier reviewers in all regards. Extremely sharp and contrasty and as quiet as billed. CA and fringing on my copy is noticeable at the long end but easily corrected, and is surprisingly low at the short end, unlike my 16-50 DA* which has the worst CA at the short end. I'm not getting rid of the 16-50 (it's a very good specimen) but for travel or any time weight is an issue I will be happy to take the 20-40 instead.

Pentax 20 - 40mm F- 2.8-4 Lens

By VAN W.

Great lens. It's now my go to lens. The images are sharp and the colors are wonderful. I recommend this lens.

Under the banner of Pentax's commitment to quality and performance, the HD DA 20-40mm f/2.8-4 ED Limited DC WR Lens, in a sleek silver finish, is a versatile tool for photographers seeking to elevate their craft. Designed specifically for K-mount APS-C cameras, this high-quality standard length zoom lens offers a unique blend of wide-angle and standard-length photography capabilities.

The lens features an impressive 35mm focal length equivalency of 30.5-61.5mm, providing a broad range for capturing everything from expansive landscapes to intimate portraits. Its advanced optical design, which combines an ED (Extra-low Dispersion) glass and a super-low dispersion glass element, ensures clear, high-resolution images with edge-to-edge sharpness.

The Pentax-developed HD coating on the lens elements minimizes unwanted reflections, combating flare and ghosting for high-contrast images that resonate with realism. The in-lens direct current (DC) Auto Focus motor ensures smooth, quiet autofocus action, capturing moments with precision and finesse. For photographers who prefer manual control, the Quick-Shift Focus System allows for an instant switch from autofocus to manual focus mode.

Built for durability, this lens is the first in the "Limited" series to feature the PENTAX-original weather-resistant construction with seven special seals. The high-grade aluminum alloy barrel is designed to withstand various conditions, from a light drizzle to a dusty trail, ensuring your lens remains ready for the next shot.

The PENTAX SP (Super Protect) coating on the lens elements acts as a shield against everyday messes like water splashes, greasy fingerprints, or dust particles, keeping your lens clean and your images sharp. The lens's rounded nine-blade diaphragm at wide apertures delivers optimal optical performance and breathtaking bokeh effects, adding an artistic touch to your shots.

In summary, the Pentax HD DA 20-40mm lens is a testament to Pentax's dedication to delivering high-quality, reliable, and advanced photography equipment. Whether you're a seasoned professional or an aspiring photographer, this lens is a versatile and durable addition to your gear.

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

  • Tailored for K-mount APS-C cameras
  • 35mm focal length equivalency of 30.5-61.5mm
  • Part of the esteemed Pentax Limited Series line
  • Durable, weather-sealed body construction
  • Advanced HD lens coating
  • Optical design includes an ED element and a super-low dispersion element
  • f/2.8-4 maximum aperture suitable for low light shooting
  • In-lens direct current (DC) motor ensuring quiet autofocus
  • Quick-Shift Focus System for rapid autofocus to manual focus transition
  • Lens barrel and hood made from high-grade aluminum alloy
  • Distinct distance and depth of field scales on the barrel
  • SP (Super Protect) coating repels dust, water, and grease
  • Seven weather-resistant seals safeguard against elements
  • Incorporates ED (Extra-low Dispersion) glass for high-resolution imagery