Pentax HD DA 645 28-45mm f/4.5 ED AW SR Zoom Lens

The Pentax HD DA 645 28-45mm f/4.5 ED AW SR Zoom Lens is optimized to provide premium performance with the Pentax 645 Digital cameras. While this ultra wide angle zoom lens is ideal for landscape photography - capturing an expansive view, it is also the perfect lens for architectural photography requiring a wide-angle of view with minimal distortion. Features: Ultra-wide-angle zoom lens HD Coating and Aero Bright Coating Weather Resistant Ideal for Outdoors, landscape Optimized for use with Pentax Medium-format Digital SLR CamerasThis zoom lens offers a zoom ratio of approximately 1.6X to cover ultra-wide-angle to wide-angle ranges; (equivalent focal lengths of 22mm to 35.5mm in the 35mm format), when mounted on a Pentax 645Z or 645D camera body. Producing visual effects; including exaggerated perspective and expanded depth-of-field, this lens can be used for a wide variety of scenes and subjects, such as sweeping landscapes, architecture and cramped rooms, adding more versatility to advanced medium-format digital SLR photography. HD Coating and Aero Bright Coating Optimize Light Transmission and Minimize ReflectionsThis lens is treated with the high-grade, multi-layer HD Coating to optimize light transmission and minimize reflections. HD coating delivers sharp, clear images free of flare and ghost images, even under demanding lighting conditions such as backlight. By coupling this coating with the Pentax-exclusive, high-grade Aero Bright Coating, this lens is designed to provide exceptionally high light transmission and super-low refraction. HD stands for High Definition.  A Pentax-original lens coating process developed through the use of nanotechnology. Using a silica aerogel with a uniform porous structure as the base material, this coating produces clear, high-quality images by assuring outstanding anti-reflection performance over a broad wavelength range. Dependable Dustproof, Weather-resistant ConstructionAs the newest member of the AW (All Weather)