The Pentax SMC FA 645 35mm f/3.5 AL IF for Medium Format is a legacy wide-angle lens that’s compatible with the Pentax 645Z. Key features include:
Excellent for landscape and architectural photography
11.8-in. minimum focus; 0.25x reproduction ratio
Advanced optical design for high-quality images
Internal-focusing system
Wide Focal Length. With a focal length equivalent to 28mm after sensor crop factor, the 35mm f/3.5 is great for landscape and architectural photography. It has an 11.8-inch minimum focusing distance and a 0.25x reproduction ratio for capturing interesting false-perspective shots.
Internal Focusing. The internal-focus design means the focusing group is much smaller and easier to move. Not only does this enable the lens barrel to stay in place while focusing, but it also increases focusing speed. This lens’s optical design includes two aspherical elements to help correct distortion.
Please Note. This is a legacy lens that was originally designed for medium-format film cameras. We’ve noticed that it tends to slightly front- or back-focus, so you’ll want to make sure you microfocus adjust before you start shooting.