Pentax DA 18-135mm f/3.5-5.6 WR Lens

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Code: 21977

or interest free for up to 12 months with

  • Weather-resistant
  • 7.5X zoom range
  • Ideal general use lens

In addition to an extended zoom magnification of 7.5x, this lens includes a simple drip-proof construction and an internal lens motor for a smooth autofocus operation.

This compact telephoto zoom lens offers a high zoom ratio of approximately 7.5 times, covering the focal length range equivalent to 27.5mm wide angle to 207mm telephoto in 35mm format, simplified weather-resistant construction and extra-smooth autofocus operation using a built-in motor. An aspherical lens element helps to compensate for spherical aberration to maximize image quality and PENTAX Super Protect (SP) coating helps repel dust, water, and grease, making the lens easier to clean. The PENTAX-original Quick-Shift Focus System allows instant switching from autofocus to manual focus operation.

High-magnification zoom

Attaching this lens to a PENTAX digital SLR camera enables use as a 7.5x high-magnification zoom lens with a focal length equivalent to 27.5mm (wide) to 207mm (telephoto) in 35mm film format. This lens is suitable for a wide range of typical photographic situations, from landscapes, snapshots, and portraits to sports events. It uses an advanced optical design for providing high magnification in a compact, lightweight body and its easy operability and mobility make it suitable as a lens for everyday use.

Simple drip-proof construction

This lens uses a simple drip-proof construction for preventing water from getting inside the lens. Combined with PENTAX digital SLR cameras also using a drip-proof construction enables use in rainy or foggy conditions, or other locations exposed to water for enhanced durability and reliability.

Internal lens motor for smooth autofocus operation

A DC motor for the autofocus (AF) incorporated within the lens enables smooth autofocus operation (Note 1). A non-rotating mechanism is also used for locking the focus ring during autofocus so that the lens is held in the same position as manual focus.

  • Note 1: The compatible models are the K-70/K-1/K-3II/K-3/K-S2/K-S1/K-50/K-30/K-5 II/K-5IIs/K-5/K-01/K-7/K-r/K-x/K-m/K20D/K200D/K10D FW Ver.1.30/K100D Super. If attached to other cameras, focusing is performed using the manual focus.

High delineation performance

The optical system uses one ED (extra-low dispersion) glass and one hybrid aspherical lens (AL) and one glass mold aspherical lens. This system enables correcting of various types of aberration and high delineation performance in a compact body design.

Round iris diaphragm for producing beautiful out-of-focus (bokeh) effect

This lens uses a round diaphragm for reducing the beams of light when shooting point light sources for enabling a more natural out-of-focus (bokeh) effect.

Other features

  • 1.Realizes minimum shooting distance of 0.4 m in the zoom range.
  • 2.Uses "Quick-Shift Focus System" for enabling manual focus operation after focusing by AF without any switching operation.
  • 3.Uses SP (super protect) coating for protecting the lens surface from water and dirt.

K series

Angle Of View

76 - 11.9° (with PENTAX D-SLR camera body)

Number Of Diaphragm Blades


Minimum Focusing Distance

0.4m (1.31 ft.)

Maximum Magnification



405g / 14.3 oz (with hood 429g / 15.1 oz)

Objective Cap


Lens Aperture Ring


Diaphragm Control

Fully Automatic


Weather sealed

Lens Construction

13 elements in 11 groups


F3.5 - 5.6

Minimum Aperture

F22 - 38

Filter Diameter



73.0mm x 76.0mm (2.9 inch x 3.0 inch)





Tripod Adapter


Focal Length

18-135mm (Equivalent to 27.5-207mm in 35mm format)

In the Box:

  • Lens Hood PH-RBC 62mm
  • Rear Lens Cap B
  • Lens Cap O-LC62 62mm
no stock  NO STOCK
no stock  NO STOCK
Find a Dealer |
Code: 21977

or interest free for up to 12 months with

  • Weather-resistant
  • 7.5X zoom range
  • Ideal general use lens
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