Canon
400mm f/4 DO IS II USM
Super Telephoto Lens
The Canon EF 400mm f/4 DO IS II USM is a super telephoto lens designed for full-frame EOS DSLRs. Dual-layer diffractive optics are incorporated into the lens' construction to produce a smaller and lighter 400mm with enhanced correction for chromatic and spherical aberrations. Four stop-effective Optical Image Stabilizer helps to minimize the appearance of camera shake and the Ultrasonic Motor (USM) works to deliver fast, precise and quiet autofocus. the weather-resistant design of the lens, protects it from dust and moisture, optimized lens coatings help to reduce lens flare and ghosting.