Answering the demand for an internally zooming, internal focus F2.8 telephoto zoom lens, Canon engineers listened to the market and delivered. Whether you are a sports photographer shooting against the glass at a hockey game, or balancing a camera and lens on a gimbal for a video production this 70-200 will definitely be a professionals ""must have"" in their kit.Compact internal zoomWith its ultra-responsive internal zoom mechanism, this 70-200mm lens makes changing focal lengths a breeze.Precision manual iris controlFeaturing a dedicated, lockable manual iris ring, this lens offers precise control over aperture settings.Whisper-quiet autofocusEquipped with two Nano Usm motors, the lens provides fast but silent autofocus that's fantastic for video.Customizable function buttonsWith two programmable lens function buttons and a control ring, you get next-level customization.