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CN7x17 KAS S: Canon’s first cine zoom lens with servo drive

CN7x17 KAS S: Canon’s first cine zoom lens with servo drive

Combining decades of experience in the design of market-leading broadcast lenses with technology derived from high-performance cine zooms, the CN7X17 KAS S responds to the growing popularity of large sensor video cameras in broadcast production. With an outstanding focal length of 17-120mm, the lens is tailor-made for camera operators in both traditional broadcast and movie environments.

Who is it for?

The removable drive unit makes it ideal for use in mobile productions such as Electronic News Gathering (ENG) or documentaries. The drive unit is the same size as those on typical ENG lenses, providing the same feel in operation and making long shoots more comfortable. High speed zoom, iris and focusing operation allow operators to respond rapidly to changes in a scene, while low speed drive functionality offers unrivalled control over slow zooming to ensure they can achieve exactly the desired effect. Immediate start-up means shots won’t be missed in pressured situations.

The CN7X17 KAS S is perfectly suited to tripod-mounted use during studio or outside broadcasts, too. Zoom, focus and iris can all be controlled using Canon’s existing zoom and focus demands, providing precise and convenient control over vital image parameters without the operator touching the lens. Virtual studio use is also supported thanks to a sophisticated 16-bit encoder output.



Key features

  • 4K optical performance thanks to Canon lens technology; designed for Super35mm cameras
  • Servo drive unit enables broadcast or hand-held production
  • A single lens for most shooting situations: highly versatile 17-120mm focal length
  • Rugged build quality for assured performance in all environments; weather- and shock-proof
  • Designed with users in mind for a familiar and intuitive experience
  • Compatible with accessories typically used in broadcast and movie environments
  • EF- (/E1 variant) and PL- (/P1 variant) mounts available for maximum camera compatibility
  • Extensive lens communication options (12-pin, EF, Cooke /i) support a range of production styles


Using Canon’s rich heritage of optical expertise, this new servo-powered lens offers outstanding quality from image centre to image edge. The CN7X17 KAS S supports 4K resolution and incorporates an 11-blade diaphragm to deliver softer, more attractive out of focus areas than 9 or 6 blade equivalents.

Thanks to an impressive 7x zoom, with focal length spanning 17-120mm, and maximum T-number of T2.95 the CN7X17 KAS S may be the only lens you need. A 3-group inner focus system developed for Canon lenses reduces focus breathing to an absolute minimum.

The CN7X17 KAS S is both weather-proof and shock-proof, making it durable enough for almost every shooting environment.


The CN7X17 KAS S employs a servo drive unit, enabling use in broadcast-style shooting environments where cine lenses are impractical. Compact and lightweight, it offers comfortable on-the-shoulder shooting with the familiar feel of a typical TV zoom lens.

Focus ring rotation is 180°, balancing the accuracy required for 4K imaging with the speed needed for broadcast use. High-resolution encoders mean that actions are precisely repeatable, whilst fast start up and high-speed operation ensure you never miss a moment.

For tripod-based set-ups existing Canon demand units can be used to control zoom, focus and iris. Virtual studio use is also supported thanks to a sophisticated 16-bit encoder output.


When the drive unit is removed, CN7X17 KAS S fits seamlessly into a movie shooting scenario where it can be operated like a traditional cine lens. Industry-standard accessories such as follow focus units are easily attached - 0.8 and 0.5 pitch gears are incorporated into the focus ring - and lens support rods can be connected. A cap ensures that the drive unit connectors aren’t affected by dust or dirt when it is detached and re-installation of the drive unit is simplicity itself. No adjustment of gear positions is required, enabling a fluid, versatile shooting style previously unavailable with large sensor cameras.

All Cinema EOS lenses are tightly colour-matched, ensuring that CN7X17 KAS S will integrate easily with other Canon cine lenses.


The CN7X17 KAS S supports multiple lens communication methods to further enhance its versatility. Canon’s EF-mount supports lens metadata and other functions such as Peripheral Illumination Correction. A 12-pin serial connection provides an interface found in broadcast environments. Cooke /i Technology is supported in the PL-mount variant, allowing capture of lens data by cameras often used in movie shooting situations.

Technical product specifications are currently unavailable.