Canon 400mm F4 DO IS II USM is an Auto Focus (AF) Telephoto Prime
lens with 35mm FF max sensor coverage and it is designed to be used with Canon EF mount lenses.
Canon replaced the older Canon EF 400mm f4.0 DO IS USM with this model. Follow the link to read our detailed comparison of these models: Compare Canon EF 400mm F4 DO IS II USM vs Canon EF 400mm f4.0 DO IS USM
Canon 400mm F4 DO IS II USM is compatible with cameras that have Canon EF lens mount.
Max sensor coverage of Canon 400mm F4 DO IS II USM is 35mm FF.
Canon 400mm F4 DO IS II USM has a fixed focal lenght of 400mm. When mounted on a 35mm FF format camera, it provides an 35mm (FF) equivalent of 400mm.
Optical Image Stabilization
Canon 400mm F4 DO IS II USM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Canon 400mm F4 DO IS II USM has a max aperture of F4.0 and a minimum aperture of F32.0.