The EF 400mm f/4 DO IS II USM lens delivers brilliant high-speed performance for professionals with minimal glare and superb image quality. Taking advantage of the best in lens technology, it features gapless dual-layer diffractive optical elements for improved diffraction efficiency with reduced flare. These elements are arranged with a large-diameter ground aspheric lens and a UD lens for a new level of sharpness and clarity. New coatings help to reduce ghosting, ensure excellent color balance and reduce fingerprints on the front and rear of the lens.

• Focal Length & Maximum Aperture 400mm 1:4
• Lens Construction : 18 elements in 12 groups
• Diagonal Angle of View : 6??10'
• Focus : Adjustment Inner focusing system with USM
• Closest Focusing Distance : 10.83 ft. / 3.3 m
• Filter Size : 52mm drop-in