PentaxPENTAX HD -D FA 70-210mm F4ED SDM WR : Telephoto zoom lens for DSLR cameras, powerful with constant f/4 aperture, weather-resistant construction, min. Focusing distance of 0.95 metres, 21217

• IN-CAMERA SHAKE REDUCTION (SR): The PENTAX digital SLR K series cameras are equipped with the SR mechanism built into the camera body. Because shake reduction is applied in the camera body, this means that any lens compatible with the K-Series cameras will benefit from image stabilization..
• HIGH IMAGE QUALITY: By using three ED glass lens elements and two super-low dispersion glass lens elements, a clear image is achieved with less chromatic aberration. Thanks to the 20 elements sharp images are captured even at the edges at any given focal length..
• HD COATING TO ENHANCE IMAGING POWER: Produce high-contrast images with edge-to-edge sharpness, free of flare and ghost images..
• SUPER PROTECT (SP) COATING: This PENTAX-original technology uses a fluorine coating that is applied to the front surface of the lens. This prevents adhesion of dust, water drops, grease and other substances, whilst making it easier to clean..
• WEATHER-RESISTANT CONSTRUCTION: The lens offers protection against water drops making it highly reliable, even when shooting outdoors..
• CLOSE UP SHOOTING: High-quality optics provide a minimum focusing distance of 0. 95 meters, allowing for use in a variety of situations..
• BUILT-IN RING SDM (SUPERSONIC DIRECT-DRIVE MOTOR): By adopting a ring SDM design, it gives high torque which enables a quieter and smoother AF operation when compared to AF operation directly in the camera and is easy and comfortable to use when focusing..
• ROUNDED DIAPHRAGM: Nine-blade, round-shaped diaphragm to produce a natural, beautiful bokeh (defocus) effect..
• KAF4 : This lens features a KAF4 lens compatible with an electromagnetic diaphragm control system. Cameras compatible with this system are K-1 Mark II, K-1, K-3 II, KP, K-70, K-3, K-S2, K-S1 and K-50. For K-1, K-3 II, K-3, K-S2, K-S1 and K-50, the camera’s firmware must be upgraded to the latest version. If this lens is ed on a camera without proper firmware upgrade, its diaphragm control mechanism becomes inactive, making it impossible to obtain correct exposure..
• WHAT'S IN THE BOX: Includes Lens Hood (PH-RBP67), Front lens cap(O-LC67) and Lens cap K..

Despite its compact, lightweight design weighing approximately 819 grams, this zoom lens covers the image circle of 35mm full-frame digital SLRs, and provides a focal length range of 70mm to 210mm to facilitate handheld outdoor photography. When ed on an APS-C-format camera, its focal length range is extended to the equivalent of 107mm to 322mm in the 35mm format. Coupled with its compact, lightweight body, it can be easily integrated in any APS-C-format camera system. In its 20-element, 14-group optics, it incorporates three ED (Extra-low Dispersion) glass elements and two anomalous dispersion glass elements to deliver high-contrast, high-resolution images with edge-to-edge sharpness, while effectively compensating for distortion and chromatic and coma aberrations. In addition to a short minimum focusing distance of 0.95 meters, the lens barrel was designed to be extension-free during AF operation to keep the overall dimensions intact. This allows the photographer to enjoy active field photography in a wide range of outdoor applications, including scenic photography, townscape shooting utilizing a beautiful bokeh (defocus) effect in the fore- and background, close-up photography of animals and s, and sports and wildlife photography where its outstanding portability really comes in handy. This lens features PENTAX’s latest HD Coating. Compared to conventional multi-layer coatings, this high-grade, multi-layer coating not only improves light transmittance but also reduces average reflectance in the visible light range by more than 50 percent, minimizing the adverse effects of flare and ghost images even in demanding lighting conditions such as backlighting. Weather-resistant construction, perfect for outdoor photography This zoom lens features a weather-resistant construction to prevent the intrusion of water into the lens barrel. When ed on a PENTAX weather-resistant digital SLR camera body, it assures a durable, reliable digital imaging system that performs superbly in demanding shooting settings — even in rain or mist, or at locations prone to water splashes or spray. This lens features SP (Super Protect) Coating on its front surface. Applied by means of a PENTAX-exclusive fluorine deposition process, this coating is highly repellent to water, grease and dirt, making it easy to wipe off stains such as fingerprints. This frees the photographer from worries in outdoor photography. This lens incorporates a ring-type SDM (Supersonic Direct-drive Motor) to assure quiet, high-speed AF operation and improve operability in outdoor shooting.