Vibration Reduction image stabilization helps to reduce the appearance of camera shake to better enable handheld shooting in low-light situations.

Multi-focus system incorporates two separate AF drive units, which are synchronized, to deliver especially fast and accurate focusing throughout the zoom range. This system uses stepping motors, which offer impressively smooth and quiet autofocus performance that is well-suited to both stills and video applications. Full-time manual focus override is also possible and an internal focusing design is used, where only the internal lens groups are moved during focusing, to maintain the overall length of the lens during use and to promote faster focusing speeds.

Programmable Control Ring is, by default, set to adjust manual focus, but can also be used to control aperture or exposure compensation.

Integrated OLED lens information panel allows you to quickly confirm aperture setting, focus distance, and depth of field figures right on the lens in both bright and dark situations.

Two assignable L.Fn buttons work in conjunction with camera-based Fn buttons to provide seamless points for quickly changing exposure settings and other functions.

Specialized electromagnetic aperture mechanism provides greater exposure control stability that is especially beneficial when working with fast continuous shooting rates.

Dust- and moisture-resistant lens barrel, along with a front fluorine coating, benefits the lens' use in inclement conditions.

Removable, rotating tripod collar spins on ball bearings to permit quick and smooth switching from vertical to horizontal shooting orientations.

Versatile telephoto zoom lens is designed for use with full-frame Canon RF-mount mirrorless cameras.

Six UD (Ultra-Low Dispersion) elements and one Super UD element help to minimize chromatic aberrations and color fringing in order to provide greater clarity and color accuracy.

An Optical Image Stabilizer helps to minimize the appearance of camera shake by five stops to better enable working in low-light conditions and with slower shutter speeds.

Three distinct IS modes are available: standard single-shot mode, a panning-optimized mode, and a mode that only activates the Image Stabilizer during the exposure.

Dual Nano USM system utilizes both a ring type USM and an STM mechanism to realize quick and accurate focusing that is also smooth and nearly silent to suit both photography and video applications. This focusing system also affords full-time manual focus control when working in the one-shot AF mode.

Configurable Control Ring can be used to adjust a variety of exposure settings, including aperture, ISO, and exposure compensation.

Protective fluorine coating has been applied to the front and rear element to resist fingerprints and smudges and to make cleaning these elements significantly easier.

As a member of the esteemed L-series, this lens has a weather-resistant design that protects against dust and moisture to enable its use in inclement conditions.

Rotation-type zoom ring features torque adjustment capabilities to fine-tune the handling of the lens or to prevent the lens from accidentally extending.

Included lens hood features a side window to allow for easier adjustment of specialized rotating filters, such as polarizers, while the lens hood is attached.

Compatible with optional Extender RF 1.4x and Extender RF 2x teleconverters, when used within the 300-500mm range of the lens, to further extend the effective focal length range.