Pentax 150-450mm f/4.5-5.6 HD DC DFA ED AW

This super-telephoto zoom lens has been developed to cover focal lengths from 150mm to 450mm — a focal-length range most demanded by high-end PENTAX-camera usersIt features the PENTAX-original, high-grade HD Coating to produce extra-sharp, high-contrast images even under demanding lighting conditions such as in backlight. It also incorporates three... moreED (Extra-low Dispersion) Glass elements and an Anomalous Dispersion Glass element to effectively compensate chromatic aberration. Its dustproof, weather-resistant body also makes it extremely dependable and durable in demanding outdoor conditions.Features:Super-telephoto coverage with three-times zoom ratio:This zoom lens covers a super-telephoto range from 150mm to 450mm. It is designed to be compact and light enough to handhold during long-range shooting of such subjects as wildlife, aircraft and sports.Outstanding image description:Thanks to its state-of-the-art optics featuring three ED (Extra-low Dispersion) Glass elements and one Anomalous Dispersion Glass element, this zoom lens effectively minimizes spherical and chromatic aberrations, while producing crisp, high-quality images free of color bleeding.HD Coating to optimize image rendition:This lens is treated with the high-grade, multi-layer HD Coating. Compared with conventional multi-layer coatings, this PENTAX-original coating assures higher light transmittance and less reflection to deliver bright, high-contrast images free of flare and ghost images, even under demanding lighting conditions such as backlight.Dustproof, weather-resistant construction:Developed as an AW (All Weather) model, this zoom lens features a dependable dustproof, weather-resistant construction with 21 special seals to prevent the intrusion of water and dust particles into the lens interior. By pairing it with 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.Newly installed three-position switch for Quick-Shift Focus System:In order to improve its operability, a three-position switch is newly installed on this lens, allowing instant switching among QFS/A, QFS/M and MF modes. QFS/A is an autofocus-priority mode, which allows the user to switch to manual-focusing operation only when autofocus operation is completed. QFS/M is a manual-focus-priority mode, which enables the user to switch to manual focusing at any time — even when the AF system is in operation. MF mode allows the user to instantly switch to manual focusing with a simple twist of the focus ring on the lens. With a choice of three distinctive modes, the user is assured of speedier, more accurate focusing operation for a given subject or application.Four AF buttons installed on the lens barrel:In order to provide more stable AF operation and better hold of the lens regardless of the camera's orientation — horizontal or