Pentax 90mm f/2.8 HD PENTAX-D FA 645 MACRO ED AW SR Autofocus Lens for Pentax 645D, Black Review

The Pentax 90mm f/2.8 HD PENTAX-D FA 645 MACRO ED AW SR is a medium-format macro lens built for the Pentax 645D system. It offers a true 1:1 magnification ratio for dedicated macro work, backed by Extra-low Dispersion (ED) glass to minimize chromatic aberration and an HD coating to reduce flare and ghosting. The lens includes built-in Shake Reduction (SR) to stabilize handheld shots at close focus distances, and its all-weather (AW) construction with 11 seals protects against dust and moisture in challenging environments. With a 67mm filter thread and a maximum aperture of f/2.8, it balances light-gathering ability with portability for a medium-format lens. This lens sits in a specialized niche, aimed squarely at Pentax 645 shooters who need macro capability without compromising on weather sealing or image quality. The inclusion of SR is particularly relevant for close-up work where camera shake is magnified. At $1,543, it represents a mid-tier investment for the medium-format ecosystem.