Canon RF 70-200mm f/4 L IS USM Lens

The Canon RF 70-200mm f/4 L IS USM is a versatile telephoto zoom lens designed for full-frame Canon RF-mount mirrorless cameras. Here are its key features:

Sleek and Lightweight Design:

The lens features a constant f/4 maximum aperture throughout the zoom range, providing consistent performance and contributing to its relatively lightweight and compact form factor. This design makes it highly portable and suitable for various photography situations.

Optical Performance:

The lens incorporates four UD (Ultra-Low Dispersion) elements, which effectively minimize chromatic aberrations and color fringing, ensuring high clarity and color accuracy in images. An Air Sphere Coating (ASC) is applied to lens elements to reduce backlit flaring and ghosting, maintaining excellent light transmission and high contrast even in strong lighting conditions.

Optical Image Stabilization:

The lens is equipped with an Optical Image Stabilizer (IS) that compensates for up to 5 stops of camera shake. When used with select Canon cameras featuring In-Body Image Stabilization (IBIS), the lens’s stabilization can work in coordination with the camera’s IBIS, providing an impressive 7.5 stops of shake correction. This stabilization system enables sharp images in low-light conditions and at slower shutter speeds.

Dual Nano USM Focus System:

The lens features a Dual Nano USM (Ultrasonic Motor) focus system, combining a ring-type USM and an STM (Stepping Motor) mechanism. This setup enables fast, accurate, and nearly silent autofocus performance, making it suitable for both photography and video applications. Full-time manual focus control is available in the one-shot AF mode, allowing precise adjustments even after autofocus has been achieved.

Configurable Control Ring:

The lens includes a configurable Control Ring that can be used to adjust various exposure settings, including aperture, ISO, and exposure compensation. This customization enhances user control and convenience during shooting.

Protective Fluorine Coating:

The lens features a protective fluorine coating on the front and rear elements. This coating resists fingerprints and smudges, making it easier to clean the lens elements and ensuring clear, sharp images.

Weather-Resistant Design:

As a member of the esteemed L-series, the lens has a weather-resistant design that protects against dust and moisture, allowing its use in challenging weather conditions. This durability enhances the lens’s reliability in outdoor and adverse shooting environments.

Firmware Update 1.1.0 (December 2021):

The firmware update adds an electronic full-time manual focus function, enabling constant manual focus adjustment in both one-shot AF and servo AF modes when using the EOS R5, EOS R6, and EOS R3 cameras. Additionally, the update improves an issue related to background blur during slow panning with specific IS (Image Stabilization) modes.