Circular (9 blades) aperture for beautiful, soft backgrounds.Impressively light at only 5.8 lbs., which makes it the lightest f/2.8 zoom lens with a 300mm focal length on the market.**.Dedicated, programmable Control Ring, with click-stop operation.2 Nano USMs achieves outstanding image quality throughout the focusing range, from infinity to close-up thanks to 2 focusing groups that are independently actuated.Up to 6.0 stops Coordinated IS when paired with EOS R series cameras featuring In-Body Image Stabilizer (IBIS). Optical image stabilization - up to 5.5 stops* of shake correction.

Built-in function/focus preset selector switch allows you to program a focus preset recall into the buttons at the front of the lens.Excellent image quality: highlights include one flourite lens, and 4 UD (Ultra-low Dispersion) glass elements, flourine coating, and Canon SSC (Super Spectra Coating) to minimize ghosting and flare.Fast f/2.8 maximum aperture throughout the whole zoom range for great control over depth of field, bokeh, and low-light shooting with fast and reliable autofocus.Telephoto zoom lens that builds on the legacy of the popular EF300mm f/2.8 lens.

Super fast copier