Canon RF 70-200mm F2.8 L IS USM

The RF 70-200mm F2.8L IS USM boasts an impressively compact design, measuring 146mm (5.8") in length when at its widest zoom position. It extends when zoomed in towards 200mm, marking a departure from its EF-mount equivalents.

The RF 70-200mm F2.8 includes a floating focus lens element for reduced focus breathing, with a total of 17 elements in 13 groups making up the optical construction. By sharing the focus movement between two independent groups, it allows the design to use 'nano USM' focus motors, which tend to be very fast and quiet but can only move light lens elements. This means Canon has been able to use this same focus motor type across its 15-35mm, 24-70mm and 70-200mm lenses.