The Canon EF 400mm f/2.8L IS II USM is the 5th generation in Canon's 400mm f/2.8 series and the successor to the current EF 400mm introduced in 1999. The new lens has been engineered for the ultimate in optical performance through the use of two fluorite lens elements for improved quality and reduced chromatic aberration.
Helping photographers in the field, Canon has reduced the overall weight of the lens by a substantial 28 percent from 189.4 oz to 135.8 oz, making it Canon's lightest weight 400mm f/2.8 lens ever. The Image Stabilizer provides an equivalent of approximately four full shutter speed steps of shake compensation and has been enhanced through the incorporation of a rolling-ball-friction system in place of sliding parts in the compensation optics barrel for a minimum-friction structure.
The overall durability of the lens has also been enhanced through increased usage of magnesium alloy and titanium for lens barrel components, together with weather sealing for all exterior joints and switches and a new fluorine anti-smear coating is applied to the front and rear elements.
The stellar combination of superlative optics, astonishing performance and brilliant construction, the EF 400mm f/2.8 IS II USM super telephoto is the professional's choice for a long lens, and perfect for nature and wildlife photography.
Over 28% lighter than its predecessor and now the lightest lens in its class, the EF 400mm f/2.8 IS II USM features Fluorite optics that deliver sharper images with less chromatic aberration, a completely redesigned Image Stabilization system that offers up to four extra stops of performance, a newly-developed Fluorine coating that keeps soiling, smears and fingerprints to a minimum, plus new construction in line with only the best that Canon has to offer.
With a third Image Stabilization mode (Mode 3) that activates IS only when the shutter button is fully pressed, and giving the equivalent effect of a shutter speed four stops faster, the EF 400mm f/2.8 IS II USM allows for easy panning and is ideally positioned for professional action photography. With a new security slot for wire-type security locks, buttons and switches are redesigned for intuitive, deliberate operation, and dust and water sealing keeps the lens functioning flawlessly in even the most challenging environments.