The Canon RF 600mm f/11 IS STM is a unique super telephoto lens. It is advantaged by diffractive optic (DO) elements and a fixed f/11 aperture, making it extremely portable for the length you get. These gapless dual-layer diffractive optics replace the traditional super telephoto's use of multiple, heavier individual elements. These optics also control color fringing and chromatic aberrations for high clarity. What you get is a 600mm lens that can be much more easily hand held, with a retractable barrel to make compact transport possible, all without sacrificing image quality. It is also equipped with an STM focus motor for smooth and quiet autofocus for both photography and videography.

This lens is part of Canon's EOS R system, one of Canon's most important releases since the EOS system began about 30 years ago. To support the optical technologies of this new system, a new mount type RF has been introduced. RF lenses take full advantage of the benefits of a mirrorless design.

Lens and Sensor Distance

The distance between the RF lens' mount and the surface of the EOS R sensor has been reduced from 44mm in the EF/EF-S system to a mere 20mm. Having larger optical elements very close to the sensor means fewer aberrations, greater brightness, and better image performance overall. The number of contact pins has been increased, elevating the speed and volume of communication between the lens and camera. This is supported by a new microprocessor within the lens that increases communication without significantly increasing power consumption. This also allows the EOS R's new Digital Lens Optimizing system to make real-time aberration and distortion corrections over a wide range of shooting conditions and ensures sharpness even when shooting RF lenses at the widest apertures.

Control and Customization

Taking advantage of the communication features listed above, RF lenses provide the unique ability to assign custom shooting functions directly to the lens. A special tactile control ring on the barrel of the lens can be assigned to functions like aperture value, shutter speed, ISO adjustment, and exposure compensation. Rotation clicks give you the sensory cue needed to make these settings changes via the while while composing your shot. You can also can change the direction of manual focus control for the focusing ring.

The Canon RF 600mm f/11 IS STM is an innovate long-range prime lens that's an ideal choice for travel, safari, sports, ceremonies, and more. It's also compatible with the Canon Extender RF 1.4x and Canon Extender RF 2x for an effective focal length of 840mm or 1200mm.