The Canon EF 400mm f/2.8L IS II 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 II 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. This lens has been superseded by the Canon EF 400mm f/2.8L IS III USM lens which is significantly lighter.