For this review, the lens was tested on a Canon EOS 5DS R using Imatest ... In summary, the Canon EF 400mm f/2.8L IS III USM lens is a superb performer. You can view additional images in the ...

The Canon Extender RF 1.4x is designed for EOS R-system mirrorless Canon cameras and compatible RF-mount Canon telephoto lenses. As such, it builds on the strength and reputation of the latest ...