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Marshall Electronics Optical Division - CS Mount varifocal lenses for the security, robotics, imaging, machine vision, OEM applications, broadcast, automobile, industrial video, covert security, and surveillance markets.

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CS Mount Varifocal Lenses with DC Auto Iris
For use with CV-340, CV-335, and other CS Mount Cameras with Auto-Iris

CS-Mount varifocal lenses

Varifocal lenses permit users to change the effective focal length (EFL) and the horizontal angle of view. This flexibility allows camera installations in a variety of places that often require lenses of different focal lengths.


  • 1/3", 1/2.7", 1/2.5", 1/4" 2MP CMOS Sensors
  • CS Lens Mount with 4Pin DC Auto-Iris Plug
  • Manual Focus Varifocal Lens
  • Maximum Relative Aperture: F1.2 ~ ∞
  • Angle of View determined by model #
Specifications for CS Mount Megapixel Varifocal Lenses
Model Focal Length (mm) F-Stop 1/4" Sensor 1/3" Sensor 1/2.5" Sensor
VS-M2812-2 2.8 ~ 12 F1.4 65° ~ 17° 82° ~ 23° 90° ~ 29°
VS-M309A 3.0 ~ 9 F1.4 62° ~ 22° 78° ~ 30° 85° ~ 34°
VS-M550-2 5 ~ 50 F1.4 40° ~ 4° 50° ~ 5.4° 58° ~ 6.3°
Click for VS-M309A Technical Data Sheet

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