The HD DA 645 28-45mm F4.5 ED AW SR 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. Designed as the HD PENTAX DA-series model in the PENTAX 645 lens series, this lens’s image circle is optimized for the image sensor of the PENTAX 645Z camera body. Its optics consists of 17 elements in 12 groups, including two high-performance aspherical elements and two ED (Extra-low Dispersion) elements, to enhance image resolution and brightness at edges, while minimizing various aberrations. Coupled with innovative lens coatings and an anti-reflective coating (applied to the interior of the lens barrel), this lens is designed to bring out the best performance of PENTAX medium-format digital SLR cameras.
Minimum Aperture: f32
Lens Construction: 17 Elements in 12 Groups
Minimum Focus Distance: 0.4m
Lens Mount: Pentax 645
Filter Size: 82mm
Weatherproof: Weather Resistant