The Compact-servo 18-80mm T4.4 Ef-mount lens combines the benefits of compact size and light weight (only 2.65 lbs.) for outstanding mobility. Designed to shoot video, this lens can be ideal for the cinematographer moving up from our Ef lenses, combining the functionality of our Ef lenses with the video shooting features of our Cinema lenses.Acknowledging the need to control zoom, focus and iris, Canon has developed this zoom lens with full external servo control. The integrated servo drive unit is compatible with broadcast industry-standard lens controllers including Canon's standard broadcast lens controllers (Zsd-300D/Fpd-400D). The optional Zsg-C10 Zoom Servo Grip can mount to the lens for handheld operation.Three levels of Image Stabilization and incorporated autofocus functions set the Compact-servo 18-80mm T4.4 Ef lens apart from traditional Super 35mm Cinema lenses. A 9-blade iris creates a rounded aperture so out-of-focus highlights appear circular.