Pentax HD 28-45mm f/4.5 PENTAX-DA 645 ED AW SR Autofocus Lens for Pentax 645D, Black Review

The Pentax HD 28-45mm f/4.5 DA 645 is a wide-angle zoom designed exclusively for the Pentax 645 medium format system. With a 35mm equivalent focal range of approximately 22-36mm, it delivers ultra-wide coverage suited to architecture, interiors, and expansive landscapes. The lens features HD coating to suppress flare and ghosting, extra-low dispersion glass for chromatic aberration control, and all-weather sealing to match the rugged build of 645D and 645Z bodies. Built-in shake reduction complements the camera's SR system for steadier handheld shooting in low light. At f/4.5, the maximum aperture is modest but typical for wide-angle zooms in this format, where depth of field management and resolving power across the larger sensor area are priorities. The 82mm filter thread is standard for medium format glass, and the included hood aids contrast in bright conditions. For Pentax 645 shooters, this lens fills the wide-angle gap with solid build quality and weather resistance, making it a practical choice for outdoor and architectural work where environmental protection matters.