Pentax's fast portrait for 645 — the FA 150mm f/2.8 IF for medium format portraiture.
The Pentax SMC FA 645 150mm f/2.8 IF is a fast telephoto prime from Pentax's 645 medium format system, providing portrait-telephoto perspective with a fast f/2.8 aperture on 6x4.5cm format. IF maintains constant barrel length during focusing.
The lens delivers 150mm (approximately 120mm full-frame equivalent field of view on 645 format) at f/2.8 with Pentax FA 645 mount for full AE and autofocus on compatible 645 AF bodies, internal focusing, and SMC multi-coating.
The 150mm f/2.8 on 645 format provides the portrait telephoto perspective with f/2.8 subject isolation at medium format scale — delivering noticeably smoother out-of-focus rendering than comparable full-frame equivalents. Used by portrait, fashion, and studio photographers requiring medium format quality.
Test AF operation on a 645 AF body. Verify IF mechanism maintains constant barrel length. Check SMC coating. Inspect focus ring for smooth travel.