EF 400mm f/5.6L USM
This high-performance lens was designed with portability and handling ease in mind. One super UD-glass element, whose characteristics are similar to fluorite, and one UD-glass element result in sharp pictures from corner-to-corner. The lens also has a built-in hood and a detachable tripod mount.
Technology
EF 400mm f/5.6L USM
Lens Diagram
US lens   Super UD lens
Ultrasonic
1 UD Glass
1 S-UD Glass
Inner/Rear Focusing
Full-Time Manual Focusing
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