Three Pentax lenses

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18-270 mm

Pentax has two new lenses designed specifically for use with K-mount camera bodies. They are the smc Pentax DA 18-270 mm f/3.5-5.6 ED SDM zoom and the HD Pentax DA 560 mm f/5.6 ED AW.

The 18-270 mm zoom (27.5-414 mm equivalent) has built-in supersonic AF driving mechanism which the company says achieves both smooth, quiet autofocusing operation and a compact, lightweight design. When mounted on an SDM-compatible K-mount digital camera body, the focus mode is automatically switched to SDM-assisted autofocusing.

Incorporating two extra-low dispersion (ED) elements in its optics, this zoom is said to deliver bright, high resolution images, even on the edges, while effectively minimizing chromatic aberration.

Minimum focusing distance is 1.6 ft. (0.49 m) over the entire zoom range.

560 mm

The 560 mm super-telephoto (859 mm equivalent) features Pentax’s HD Coating – a newly developed high grade multi-layer lens coating. Compared with conventional multi-layer coatings, this new coating provides higher light transmittance with reduced reflection, to deliver sharp, clear images free of flare and ghosting, even under demanding lighting conditions such as backlight, says Pentax.

As a new model of the AW (All Weather) series, this lens features a dustproof, weather-resistant construction with 29 special seals to prevent the intrusion of dust and water into the lens interior.

This lens comes with a built-in, removable filter holder in the barrel. By mounting the C-PL (circular polarizing) filter (40.5 mm in diameter; included as an exclusive accessory) to the holder, the user can easily obtain the desired polarizing effect simply by rotating the filter using its control ring.

The lens exterior has been painted white to minimize heat haze generated inside the lens barrel due to long exposure to the sun. Strap lugs are made from machined aluminum.

The lens delivers smooth autofocus operation using an AF driving motor (DC motor) installed in the lens barrel.

There’s a Quick-Shift Focus system for instant switching to manual focus operation after the subject is captured in focus by the camera’s AF system.

An SP (Super Protect) coating is applied to the front surface of the lens to effectively repel water and grease and easily wipe off dust and stain.

Both lenses are compatible with the K-5 II, K-5 IIs, K-30, K-01, K-5, K-r, K-7, K-x, K-m, K20D, K200D, K100D Super and K10D camera bodies (with Ver. 1.30 or later firmware installed). When mounted on other camera bodies, the focus mode is automatically switched to manual.

There’s no word on Canadian pricing or availability, although both lenses are expected to hit retail shelves late this year in the U.S.

Medium-format lens

Macro 90 mm

The HD Pentax D FA 645 Macro 90 mm f/2.8 ED AW SR lens is designed exclusively for the medium- format 645D SLR camera body.

This lens offers an equivalent focal length of approximately 71 mm (or approximately 56 mm when mounted on a 645 film-format camera body).

The company says by incorporating two ED (extra-low dispersion) elements and one glass-molded aspherical element in its optics, the lens assures high resolution image reproduction over the entire image field, while effectively minimizing chromatic aberration.

The lens offers macro photography at a maximum magnification of 0.5X. In close-up applications, its floating mechanism effectively compensates for the curvature of the field to assure sharp, well-defined images.

New HD Coating and Aero Bright Coating optimize light transmittance and minimize reflection.

This is the first lens to incorporate the SR (Shake Reduction) mechanism within the lens barrel. This mechanism effectively compensates for camera shake up to approximately 3.5 shutter steps.

Part of the AW (All Weather) series, this lens features a dustproof and weather-resistant construction with 11 special seals to effectively prevent the intrusion of dust and water into the lens interior.

This lens also has the Quick-Shift Focus system for instant switching to manual focus operation after the subject is captured in focus by the camera’s AF system.

It also has the SP (Super Protect) coating on the front surface of the lens.

Again, there’s no word on Canadian availability or pricing.

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