As a lens designed for sports, events, and other moving subjects, AF and IS functions have been optimized for quick and precise performance along with the ability to work with the lens handheld or from a monopod if desired.
- Dual Nano USM system uses both a ring type USM and an STM mechanism to realize quick and accurate focusing. The smooth and nearly silent focusing suits both photography and video applications and there is full-time manual focus control available.
- Two separate focusing groups are independently actuated for greater maintained sharpness throughout the zoom range and at different focus positions.
- Focus range limiter can be set to the full focusing range, from 5.9' to infinity, or from a 19.7' to infinity range for quicker performance if working exclusively with distant subjects.
- Optical image stabilization compensates for up to 5.5 stops of camera shake; if paired with an EOS R camera featuring in-body image stabilization, this lens also supports Coordinated IS that offers up to 6 stops of shake correction.