The Canon EF-mount 17-120mm zoom lens is formally known as the Canon CINE-SERVO 17-120mm T2.95-3.9 (CN7x17 KAS S/E1).1 It’s a high-performance cinema/broadcast hybrid lens designed for professional shooting environments.

Versatile 17-120mm Focal RangeOffers a 7x zoom ratio, covering wide-angle to telephoto for diverse shooting needs (documentary, drama, broadcast, etc.).

High Optical Performance: Supports 4K resolution (and in newer versions, up to 8K) with high optical quality across the entire zoom range.

Fast Aperture: Features a maximum aperture of T2.95 (at 17-91mm) to T3.9 (at 120mm), offering good low-light performance and shallow depth of field control.

Detachable Servo Drive Unit: Includes an ENG-style servo drive unit for electronic control of zoom, focus, and iris (broadcast style). This unit is removable for manual, cinema-style shooting (using standard cine accessories).

Super 35mm Coverage: Designed to cover the Super 35mm sensor format, a common standard in digital cinema cameras.

Cinema Features: Includes an 11-blade iris for attractive bokeh, cine-standard gear pitches (0.8 and 0.5 MOD), and focus marks on both sides of the barrel

Metadata Output: Features a 16-bit encoder to output high-resolution metadata for use in virtual studio systems.

Rugged Design: Built to be durable, weatherproof, and shockproof for reliable use in challenging environments.