The Canon EF 400mm f/2.8L IS III USM lens is a full-frame, fast, super-telephoto lens compatible with Canon EF cameras and adaptable to Canon RF cameras with the help of a mount adapter.
The Canon EF 400mm f/2.8L IS III USM lens is a full-frame, fast, super-telephoto lens compatible with Canon EF cameras and adaptable to Canon RF cameras with the help of a mount adapter. This lens has a wide aperture making it suitable for use with Canon's 1.4x and 2x teleconverters. This lens is suitable for shooting fast action in low light situations.
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