Pre-Photokina 2010: In conjunction with its introduction of the K-5, Pentax has announced the smc DA 18-135mm F3.5-5.6ED AL [IF] DC WR lens. With an equivalent focal length ranging from 27.5mm wide angle to 207mm telephoto, the weather-resistant lens is made up of 13 elements in 11 groups including ED glass, hybrid aspherical and glass-moulded aspherical elements. Priced at £599.99, the lens will be available from November 2010.

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Press Release:

smc DA 18-135mm f/3.5-5.6
A high-zoom-ratio standard zoom lens, designed exclusively for PENTAX digital SLR cameras

PENTAX Imaging Systems announces the launch of a brand new lens.  The smc PENTAX-DA 18-135mm F3.5-5.6ED AL[IF] DC WR features a practical 7.5-times zoom ratio.

Designed exclusively for use with PENTAX digital SLR cameras, this interchangeable standard zoom lens features a simplified weather-resistant construction and extra-smooth autofocus operation using a built-in motor. One lens to suit all needs.

What are its key features?

High zoom ratio
When mounted on a PENTAX digital SLR camera body, this standard zoom lens offers a high zoom ratio of 7.5 times, covering the focal length range between 27.5mm wide angle and 207mm telephoto in the 35mm format. This high zoom ratio gives it the versatility to accommodate a wide range of subjects and scenes. Thanks to advanced PENTAX optics design technology, it is compact and lightweight, despite its high zoom ratio, making it a versatile, manoeuverable every day-use lens.

Simplified weather-resistant construction
This zoom lens features a simplified weather-resistant construction to prevent the intrusion of water and moisture. By mounting it on a weather-resistant PENTAX digital SLR camera body, the user is assured of a durable, dependable digital imaging system that performs excellently, even in the rain and wet conditions.

Extra-smooth SDM autofocus operation
A DC motor built into the lens’ AF (autofocus) unit assures extra-smooth autofocus operation.  It features a rotation-free mechanism to keep the focus ring stationary during autofocus operation. The user can hold the lens in exactly the same way as when using it in the manual-focus mode.

High-quality image detail
Incorporating an ED (Extra-low Dispersion) glass element, a hybrid aspherical element and a glass-moulded aspherical element in its optics, the lens promises exceptional image detail with minimal aberrations. These elements also contribute to the downsizing of the lens body.

Rounded diaphragm to produce beautiful bokeh
The lens features a completely rounded diaphragm to produce a natural, beautiful bokeh (out-of-focus) effect, while minimising the streaking effect of point light sources.

smc PENTAX-DA 18-135mm F3.5-5.6ED AL[IF] DC WR specifications

Focal length 18-135mm
35mm equivalent focal length (APS-C) 27.5-207mm
Diagonal angle of view (APS-C) 76°- 11.9 °
Maximum aperture F3.5-5.6
Minimum aperture F22-38
Lens Construction • 13 elements/ 11 groups
• 1 ED glass element
• 1 hybrid aspherical element
• 1 glass-molded aspherical element
Number of diaphragm blades 7, rounded
Minimum focus 0.4m
Maximum magnification 0.24x
AF motor type • DC Motor
• Quick-shift manual focus
Filter thread 62mm
Supplied accessories • Front and rear caps
• Lens hood PH-RBC62mm
Weight 405 g (14.3 oz)
Dimensions 73mm diameter x 76mm length
(2.9 x 3.0 in)