Pentax SMC DA* Series 50-135mm f/2.8 ED IF SDM Telephoto Zoom Lens for Pentax and Digital SLR Cameras
Designed for exclusive use with Pentax digital SLR cameras, the Pentax DA series 50-135mm telephoto zoom lens makes it easy to capture close-in sports shots or intimate wildlife photography. The lens is distinguished by its aspherical elements, special optical-glass elements, and original glass coatings, which help produce a high contrast, unmatched clarity, and edge-to-edge sharpness. The lens also boasts a tightly sealed weather- and dust-resistant housing that stands up to rainy or dusty conditions. And users will love the new SDM system, which produces smoother, quieter autofocusing using a built-in supersonic motor. Other details include a Pentax-original Quick-Shift Focus System that switches instantly to manual-focus operation, a Pentax SP coating that protects the exposed lens elements, and a focal length equivalent to 76.5-207mm in the 35mm format.Lens mount: Pentax KAF2Lens construction: 18 elements in 14 groupsAngle of view: 31.5 to 11.9 degrees (when used with Pentax digital SLR camera body)Aperture control: AutomaticMinimum aperture: F22Metering system: TTL open-aperture meteringMinimum focusing distance: 1 meterFilter size: 67mmMaximum magnification: 0.17xDimensions: 3 inches in diameter and 5.4 inches longWeight: 24.2 ounces (without hood)