The motor unit housing the servo motors and zoom rocker may be removed for cinema style shooting where full manual control is preferred
The lens is compatible with a wide array of accessories common in the cine industry, including matte boxes, follow focuses, and electronic and wireless controllers. The focus ring features both a 0.8mm MOD cine standard gear ring as well as a 0.5 Canon MOD ring, the zoom features a 0.5 Canon MOD, and there is also a 0.5 MOD iris gear
The lens communicates directly with Cinema EOS camera through the lens interface. This allows lens metadata such as zoom setting and iris to recorded in the camera. Note that a firmware update may be required for proper communications between the lens and the camera. In addition, the lens features a standard 12-pin broadcast camera interface and can also transmit zoom, focus, and iris data to a camera or other device via this connection.
The lens features 11 aperture blades to make lens flares and orbs caused by the bokeh effect as close to round as possible. With fewer blades, it is often possible to see the geometric shape of the aperture. Additionally, using an odd number of blades helps prevent diffraction effects that can cause pin-points of light to produce an unwanted "staring" effect
Because glass lenses can never be totally free from chromatic aberration Canon applies a special coating, fluorite, which has an anomalous dispersion characteristic effectively reducing the aberration below what is possible with optical glass alone
The lens features a 20x zoom range of 50 to 1000mm, which is very long for a lens that supports the Super35 format. A built-in 1.5x extender allows you to increase the zoom range to 75 to 1500mm while still supporting 4K resolution.
High speed servo-driven zoom and iris is available for critical situations such as while filming sports or fast action. Meanwhile, slower speed settings are available for more expressive work. With this variability, the zoom duration can be set to last anywhere from 1.5 to 180 seconds
Via three 20-pin connectors below the servo, it is possible to connect an external system to collect 16-bit virtual image data
In addition to servo zoom, focus, and iris, another ENG-derived feature is the knurled focus ring, which is limited to a 180° rotation