HOYA COPRORATION PENTAX Imaging Systems Division is pleased to announce the launch of the smc PENTAX-DA18-135mmF3.5-5.6ED AL[IF] DC WR. 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, in addition to its high 7.5-times zoom ratio.

Major Features

High zoom ratio

When mounted on a PENTAX digital SLR camera body, this standard 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. This high zoom ratio gives it the versatility to accommodate a wide range of subjects and scenes that photographers come across in their shooting sessions — from scenic images and snapshots to portraits and sports photos. Thanks to advanced PENTAX optics design technology, it has been designed to be compact and lightweight despite its high zoom ratio, making it a versatile, maneuverable everyday-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 superbly, even in the rain and mist, as well as at locations prone to the spray of water.
Extra-smooth SDM autofocus operation

A DC motor built into the lens’ AF (autofocus) unit assures extra-smooth autofocus operation.* Since 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 this lens in the manual-focus mode.
* This lens is compatible with the PENTAX K-5, K-r, K-7, K-x, K-m, K20D, K200D, K100D Super and K10D (with Ver. 1.30 or later firmware installed) camera bodies. When mounted on other camera bodies, the focus mode is automatically switched to manual.

High-quality image description

Incorporating an ED (Extra-low Dispersion) glass element, a hybrid aspherical element and a glass-molded aspherical element in its optics, the lens assures exceptional image description with minimal aberrations. These elements also contribute to the downsizing of the lens body.
Round-shaped diaphragm to produce beautiful bokeh

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

Minimum focusing distance of 0.4 meters over the entire zoom range
Quick-Shift Focus system for instant switching to manual-focus operation after the subject has been captured in focus by the AF system
SP (Super Protect) Coating applied to the front surface to repel dust, water and grease