Construction and Optical Design
The lens's internally focusing, internally zooming construction optimizes it for video shooters who intend to mount it on a gimbal. Two floating focus Nano USM motors drive the Dual Pixel CMOS autofocus and can operate independently of one another, resulting in fast and quiet autofocus that also benefits video. The construction also suppresses focus breathing, maintaining the integrity of the image as you move through the zoom range, and a manual, lockable iris ring ensures the integrity of the exposure as you shoot.
Optically, the lens has 18 elements in 15 groups, incorporating two super ultralow dispersion elements, another ultralow dispersion element to minimize chromatic aberrations, and three additional aspherical lenses to ensure the highest edge-to-edge image quality. Canon's own Air Sphere and Super Spectra Coatings are applied to the front element to reduce ghosting and flare, while a fluorine coating repels oil and water to protect the lens.
Additional Benefits
Fast and quiet, ideal for single operator filming, with optional RF 1.4x and 2x Extenders, and optional power zoom adapters.
Produce high-quality stills and videos with greater reach, to capture every event of the day even when the light drops.
11-blade aperture and longer focal lengths for stunning out-of-focus backgrounds, plus incredible sharpness and colour accuracy.
70mm
Capture stunning stills and steady footage with a versatile 70-200mm focal length range, while maintaining great depth-of-field control thanks to a constant f/2.8 aperture. Achieve sharp results with a 5.5-stop Optical Image Stabilizer1, and more with an IBIS-equipped camera4.
Avoid aberration, ghosting and flare, thanks to two Super UD lenses, one UD lens, three aspherical lenses, and ASC and Super Spectra coatings. Plus, a fluorine coating protects the front element from dirt.
Manually adjust your aperture with a smooth Iris Ring and enjoy a smoother, silent operation with 32 steps between stops in movie mode. A lock release switch for the 'Auto' position provides greater control, with an 11-blade iris for beautiful circular bokeh.