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85-300mm T2.9-4.0 Lightweight Telephoto zoom

ZK3.5x85 is a telephoto zoom lens with a frequuently-used focal length covering from 85 to 300mm. Thanks to the detachable servo drive unit on the ZK series, the lens can be operated in the same manner as a traditional broadcast ENG-Style lens and accessories. Furthermore, with the servo drive unit removed, traditional cinema manual, or external cine motors for zooming and focusing operation is also available for all models of this series.

With the latest optical simulation technology and high precision large diameter aspherical elements, it has achieved both high optical performance and a lightweight compact body of 2.9kg. Thanks to high resolution from the center to corner, high image quality without image distortion will be exhibited on the large screens of movie theaters.


  • Outstanding 4K optical performance and compact design
  • ENG-Style with Detachable Servo Drive Unit
  • Super 35mm large format coverage
  • Compatible with current broadcast and cine lens accessories
  • Natural Bokeh(Blur) thanks to 9-Brads Round Iris
  • 16bit encoder for virtual device


Model name: ZK3.5x85
Application: 35mm PL Mount Camera
Focal length: 85-300mm
Zoom raito: 3.5x
T-no.: T2.9 (85-218mm) T4.0 (300mm)
Iris blades: 9
M.O.D.from image planes: 1.2m / 4'
Object dimensions at M.O.D. 85mm 274 x 154mm
1.78 : 1 Aspect raito* : 300mm 79 x 44mm
Angular field of view 85mm 18°21' x 10°23'
1.78 : 1 Aspect raito* : 300mm 5°14' x 2°57'
Focus rotation: 200°
Zoom rotation: 120°
Size (φ x Length): φ114 x 249mm
Mass: 3.1 kg (with Drive Unit) / 2.6 kg (without Drive Unit)
*Sensor Size : 27.45 x 15.44mm  

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