Schneider-Kreuznach LS — wide-angle 35mm f/3.5 leaf-shutter lens for Phase One 645 / Mamiya 645AF
The LS 35mm f/3.5 is a wide-angle addition to Schneider-Kreuznach's leaf-shutter LS line for the Phase One 645 digital platform, expanding the initial 2010 launch lenses to cover architecture and landscape work on the Mamiya 645AF-mount bodies used by Phase One and Mamiya digital backs.
Like the rest of the LS series it houses its own in-lens leaf shutter, permitting flash sync at any speed rather than being limited by a focal-plane shutter's sync speed. It autofocuses through the barrel when paired with a compatible Phase One 645DF-series or Mamiya 645DF body and covers the sensor area of digital backs on that mount.
On a medium-format sensor 35mm gives a genuinely wide field of view useful for interiors and landscapes, while full-range flash sync makes it a practical choice for architectural interiors lit with strobes rather than ambient light alone.
As with other LS lenses, used stock is concentrated among Phase One and Mamiya 645DF owners, making it a specialist rather than volume item. Buyers should verify the leaf shutter operates cleanly at all speeds, check autofocus responsiveness, and confirm compatibility with the digital back in use.