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 cameras.
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
Lenses in Canon EF Mount with Same Focal and Aperture Range
Lens Mount
Canon 400mm F4 DO IS II USM is compatible with cameras that have
Canon EF lens mount. Some of the latest released cameras with Canon EF lens mount are
Canon 1D X III,
Canon 6D MII and
Canon 5D MIV.
Sensor Coverage
Max sensor coverage of Canon 400mm F4 DO IS II USM is
35mm FF.
Focal Range
Canon 400mm F4 DO IS II USM has a fixed focal lenght of 400mm. When it is mounted on an APS-C sensor camera with 1.6x crop, it provides an 35mm (FF) equivalent of 640mm.
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.
Body Colour
Canon 400mm F4 DO IS II USM is available in White color.
Zoom Method
Canon 400mm F4 DO IS II USM features
Rotary (internal) zoom method where the length of the lens doesn't change while you are zooming in or out. Even though this design has a size disadvantage in general compare to extending designs, it has the benefits of better sealing against dust and moisture, no zoom creep and no weight balance shift while zooming.
Aperture
Canon 400mm F4 DO IS II USM has a max aperture of F4.0 and a minimum aperture of F32.0.
Optical Formula
Canon 400mm F4 DO IS II USM's optical formula consists of 18 elements in 12 groups.