24mm focal length; maximum aperture f/3.5. angle of view: 83.5 degrees on full frame and 59.9 degrees on APS-C. Construction: 16 elements in 11 groups with 2 aspherical lenses. Maximum tilt amount of 8.5, Maximum shift amount of 12mm; 90 right and left mount rotation with click stops for each 30 step; Manual focus. Constructed for full frame cameras but can also work on APS-C; Takes 82mm Filter Size / Lens not Zoomable