The Canon RF 100-400mm F5.6-8 IS USM is one of the more affordable telezooms available, but its relatively dim maximum aperture makes it a better choice for use outdoors than under artificial light.

At 100mm, central sharpness is outstanding at f/5.6 and f/8, excellent from f/11 to f/22 and then diffraction hits, although it is still good at f/32. The edges are very good at f/5.6, excellent from ...

The Canon EF 100-400mm f/4.5-5.6L IS II USM is a new professional telephoto zoom lens for full-frame DSLR cameras. Is this the perfect do-it-all super-telephoto zoom lens for wildlife and sports ...