Revised Optics for a Lighter Super Telephoto EF L Lens. Continues Strong Tradition of Image Quality Associated with L Series Lenses. Super Spectra Coating (SSC) and Air Sphere Coating (ASC) Minimize Ghosting and Flare. Increased Heat Shielding Measures for Reliable, Longer Shooting Outdoors.

The Canon EF 600mm is a super-telephoto lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. f / 4L USM lens was released in November 1988 (923,000 yen).

Diameter and Length. The lens length is measured from the lens mount surface to the front end of the lens. The max. diameter x length and weight listed are for the lens only. The Close-up Lenses 250D and 500D cannot be attached. Aperture settings are specified on the camera. All data listed is measured according to Canon standards.

Utilizing Ring USM (Ultrasonic Motor), the Canon EF 600mm f/4L IS USM Lens autofocuses fast and has FTM (Full Time manual focus). AF accuracy is excellent in both one-shot and AI Servo modes.

Cherished for sports and wildlife applications, the EF 600mm f/4L IS III USM is a Canon L-series super telephoto lens distinguished by its advanced, lightweight design, quick and intuitive handling, and high speed performance.

The EF 600mm f/4L IS III USM Lens is the 6th generation in Canon's 600mm f/4 series, replacing the introduced-in-2011 Canon EF 600mm f/4L IS II Lens, and the 3rd IS version. Owners of this lens will, like owners of the previous lens versions, primarily be professional and serious amateur photographers (or simply wealthy).

The EF 600mm f/4L IS III USM delivers ultra-high sharpness and very low levels of distortion. Fluorite lens elements reduce coloured fringing and boost resolution and contrast.

The EF 600mm f/4L IS USM is a professional level large-aperture super-telephoto lens for Canon EOS SLR Bodies. The 600mm f/4L IS is an premium lens for demanding photographers who want the best possible ultra high magnification images.