The Pentax HD D FA 645 35mm F3.5 ($1,599) covers a wide-angle field of view when paired with a Pentax 645Z ($5,080.93 at Amazon) or 645D ( at Amazon) medium format camera. Considering that it's designed to cover an image sensor larger than you'll find in full-frame SLRs, it's surprisingly light and compact. Although it shows some barrel distortion, the lens is very sharp. It's a solid option for Pentax medium format photographers. DesignThe HD D FA 645 35mm ($1,925.96 at Amazon) measures 3.5 by 3.5 inches (HD), weighs 1.3 pounds, and supports 82mm front filters. It wouldn't be considered overly large when paired with a full-frame SLR, and is downright svelte in the world of medium format, especially when you consider its wide-angle coverage. The lens captures a field of view that's roughly equivalent to a 28mm prime on a full-frame 35mm camera. The lens barrel is metal and free of toggle switches. It does have a physical aperture ring (you'll want to set it to the A position t...
The Pentax HD D FA 645 35mm F3.5 is a sharp wide-angle lens for the 645 medium format system, but it does show a little barrel distortion.
Crisp optics from edge to edge; Light and compact; Focus clutch system
Some barrel distortion; Dim corners at wide apertures; Lacks weather sealing