Schneider-Kreuznach LS 40-80mm f/4-5.6 Zoom AF Aspherical Leaf Shutter Lens for XF 645 Bayonet Mount, Black Review

The Schneider-Kreuznach LS 40-80mm f/4-5.6 is a medium format zoom lens designed for Phase One's XF 645 bayonet mount cameras. It features a built-in leaf shutter, which enables flash sync at all shutter speeds and exceptionally quiet operation, making it well-suited for studio work and on-location portraiture where silence and precise lighting control matter. The aspherical element design aims to maintain sharpness across the zoom range, and autofocus provides convenience in a system often dominated by manual focus primes.

At $3,265, this lens sits in the mid-range for medium format glass, offering a practical standard zoom range equivalent to roughly 32-64mm in full-frame terms. The variable f/4-5.6 aperture is typical for zooms in this format, though it won't match the shallow depth of field or low-light performance of faster primes. The leaf shutter is the standout feature here, a rare and valuable asset for commercial and fashion shooters who need to overpower ambient light or work in noise-sensitive environments. It's a specialized tool that fills a specific gap in the Phase One XF ecosystem.