Overview

The Canon RF 600mm F4L is optically identical to the EF 600mm f/4L IS III, delivering stunning image quality with soft backgrounds and excellent subject isolation. Its main weakness is the lack of a new optical design, being essentially the EF lens with a built-in adapter. Build is robust but heavy at nearly 7 lbs, and handling benefits from native RF mount features like improved stabilization and compatibility with RF extenders. It suits professional wildlife and sports photographers willing to invest $13,000.