Features: Mounts Contax 645 (C645) Mount Lenses to Sony E-mount mirrorless cameras; infinity focus or beyond guaranteed Adapter allows the lens to shift 9mm in each direction and rotate 360 degrees Integrated adjustable iris to allow some control over depth of field Enhanced craftsmanship and high-tolerance construction for demanding professionals Precise fit and solid connection; lens has no play, gap or wiggling when mounted on adapter and no adjustments required Precision all-metal construction with chrome plated brass mounts for secure and solid fit 24-Month Fotodiox warranty This adapter will severely  Vignette when Iris closes down !  Mirrorless cameras aren't only revolutionary because of their compact size; they're even more versatile for mounting lenses than their full-sized counterparts! Fotodiox offers strong support for mirrorless camera platforms with hundreds of options for mounting both modern and vintage lenses. Our adapters deliver infinity focus, manual aperture control, and a sturdy build for lasting quality. Lens Mount: Contax 645 (C645) Mount Lens Body Mount: Sony Alpha E-Mount Mirrorless Camera Body Manufacturer: Fotodiox Inc. Warranty: 24 Months Note: • This is a manual adapter, so lens functions that rely on electronic communication with the camera body (autofocus, AE metering, image stabilization, etc.) will be disrupted. • Some cameras need to be set a certain way to work with our adapters or you may get a message such as 'Error Lens Not Attached - Check lens'. Please check the on a variety of camera brands. support articles on the Fotodiox Knowledge Base for possible solutions • requires power to engage the manual focus rings on the lens, since manual lens mount adapters do not power the lens, those lenses will not be able to focus. 'Focus-By-Wire' lenses (such as Canon's STM or Nikons AF-P) • Set your exposure manually or meter using your camera's Aperture Priority (stop-down) mode. • If your lens does not have a manual aperture control ring, the lens aperture will revert to its default position, which depending on the lens is either stopped down to its largest f-stop or opened up to its smallest f-stop. • To determine what the new 'Crop Factor' or 'Equivalent Focal Length' of the lens when used on your camera will be, . please check the Fotodiox Knowledge Base article All pictures are for illustration purposes only. Actual product may vary slightly due to ongoing improvements in design.