Overview

The Canon EF 500mm f/4.0L IS USM is a super telephoto lens known for exceptional sharpness, even wide open at f/4, and fast, quiet autofocus. It performs well with 1.4x extenders. Build quality is impeccable, but the lens is large and heavy at 8.3 lbs, requiring steady support. Its main drawbacks are size and high cost, though used prices may drop with the Mark II release. It suits wildlife, motorsports, and bird photographers who prioritize image quality and can manage the weight.