In summary, the Canon EF 400mm f/2.8L IS III USM lens is a superb performer. You can view additional images in the Equipment Database, where you can add your own review, photos and product ratings.

As such, it builds on the strength and reputation of the latest Canon Extender EF 1.4x III for DSLRs ... RF prime and zoom telephoto lenses, from the Canon RF 100-400mm F5.6-8 IS USM right ...