Canon EF 400mm f/4 DO IS II USM Lens Compact, lightweight super telephoto lens that is ideal for sports and wildlife photography Newly-developed gapless dual-layer diffractive optical elements deliver improved image quality with reduced flare Optical Image Stabilizer provides up to four shutter speed stops of correction Power Focus mode enables smooth focus shifts essential for filmmaking Minimum focusing distance of 10.8 Ft./3.3 m.