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This lens incorporates a ring-type, high-torque SDM (Supersonic Direct-drive Motor) to assure quiet, high-speed AF operation and improve operability in outdoor shooting.
This lens features a focus range limiter, which helps you minimize AF operation time by limiting the operational range of the focus mechanism. By selecting one of the two operational sub-ranges divided at a focusing distance of two meters (0.95 meters to 2.0 meters; 2.0 meters to infinity), you can cut AF operation time down to nearly one-third of full-range operation.
Slide the focus range limiter switch to the LIMIT position, and the focus range is automatically set to one of two sub-ranges (0.95 meters to 2.0 meters, or 2.0 meters to infinity) according to the position of the focus-element group at the moment. For instance, if you activate the focus range limiter when the lens’s focus ring scale indicates a focusing distance of five meters, the focus range limiter automatically selects the sub-range of 2.0 meters to infinity. When the focus ring scale indicates one meter, it selects the sub-range of 0.95 meters to 2.0 meters.
Sub-range of 2.0 meters to infinity: When you want to focus on images such as an airplane or automobile positioned at a distance beyond a wire fence, you can select this sub-range to ensure that the camera does not focus on the fence.
Sub-range of 0.95 meters to 2.0 meters: When you want to focus on the subject a short distance away, such as a flower, you can select this sub-range to keep the camera from focusing on distant objects in the background, such as a building.
Despite its compact, highly portable design, this high-performance telephoto zoom lens covers the image circle of 35mm-format full-frame digital SLR cameras. Since it is designed to be compact and lightweight with a weather-resistant construction, it delivers outstanding imaging performance in a wide variety of applications. With the addition of the high-grade, multi-layer HD Coating to the optics, the overall lens coating performance has been optimized. The result is that it delivers sharp, high-contrast images, while minimizing flare and ghost images in backlit situations.
Despite its outstanding portability, assured by a compact, lightweight body measuring 175 millimeters in length and weighing 819 grams (859 grams with a lens hood), this zoom lens delivers exceptional imaging performance over the entire zoom range. Coupled with a weather-resistant construction which prevents intrusion of water into the lens barrel, it performs superbly in all types of active outdoor photography.When mounted on an APS-C-format camera, its focal length range is extended to the equivalent of 107mm to 322mm in the 35mm format. Its outstanding portability makes outdoor photography simpler, more effortless and more enjoyable. When coupled with the HD PENTAX-DA AF REAR CONVERTER 1.4X AW, you can further extend the focal length range to cover a wider range of subjects.
Thanks to a minimum focusing distance of 0.95 meters and a maximum magnification of 0.32 times, the HD PENTAX-D FA 70-210mm F4ED SDM WR can be used as a telephoto macro lens to expand your freedom of expression. In addition, the lens barrel is designed to be extension-free during autofocusing and zooming operations to keep the overall dimensions intact. When mounted on an APS-C-format camera, the maximum magnification is increased to approximately 0.48 times in the 35mm format. Since it allows you to capture close-up images nearly at half life-size (0.50 times), it will greatly expand the creative freedom of tele-macro photography.
Although their F numbers at open aperture vary, both this lens and the HD PENTAX-D FA★ 70-200mmED DC AW have a similar focal-length range.
The HD PENTAX-D FA★ 70-200mmED DC AW retains the uniform aperture of F2.8 over the entire zoom range to deliver the exceptional image quality characteristic of Star-series lenses, because PENTAX placed priority on imaging performance over magnification in close-range photography. That’s why the middle optical-element group, rather than the large, heavier front optical-element group, is used for focusing operations. By using the middle optical-element group for focusing, this lens provides a broader angle of view for a given focusing distance in close-range photography. Because of this, its maximum magnification is limited to 0.13 times.
On the other hand, the HD PENTAX-D FA 70-210mmED SDM WR has a smaller lens barrel diameter by setting the maximum aperture to F4, while using the front optical-element group for focusing operations. By using the front optical-element group for focusing, this lens provides a narrower angle of view for a given focusing distance in close-range photography. It also benefits from a shorter minimum focusing distance of 0.95 meters. Thanks to these two factors, its maximum magnification is increased to 0.32 times.
70 to 210mm
Angle of View
34.5° to 11.8°
Minimum Focus Distance
3.12' / 95 cm
20 Elements in 14 Groups
67 mm (Front)
Dimensions (ø x L)
78.5 x 175 mm
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C.R. Kennedy is Australia’s leading importer and distributor of photographic equipment. Our head office and main warehouse is located in Melbourne with branch offices and warehouses in Adelaide, Brisbane, Cairns, Perth and Sydney.
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