- Telephoto zoom lens that builds on the legacy of the popular EF300mm f/2.8 lens.
- 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.
- 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.
- Built-in function/focus preset selector switch allows you to program a focus preset recall into the buttons at the front of the lens.
- Optical image stabilization — up to 5.5 stops* of shake correction. Up to 6.0 stops Coordinated IS when paired with EOS R series cameras featuring In-Body Image Stabilizer (IBIS).
- 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.
- Dedicated, programmable Control Ring, with click-stop operation.
- Impressively light at only 5.8 lbs., which makes it the lightest f/2.8 zoom lens with a 300mmfocal length on the market.
- Circular (9 blades) aperture for beautiful, soft backgrounds.
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