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The CS-Mount 4.5-12.5mm Varifocal Lens from computar is designed for day/night cameras with 1/2" format sensors. The lens facilitates easy focal length adjustments, enabling you to change the focal length without having to move your camera from its installation point. With an aperture of f/1.2 to f/16C, the lens is suitable for surveillance in low-light as well as bright light conditions. Furthermore, this IR-corrected lens captures clear images, eliminating focus shift and infrared bleed.
Designed for CS-mount day/night cameras with 1/2" sensors
4.5-12.5mm focal length translates into a zoom of 3x
Easy focal length adjustments
Aperture of f/1.2 to f/16C enables use in low-light as well as bright light conditions
Manual iris for correct exposures
IR correction minimizes focus shift and IR bleed, making the lens suitable for 24-hour surveillance operations
Aspherical lens surface provides corner-to-corner sharpness for all aperture settings
In the Box
computar CS-Mount 4.5-12.5mm Varifocal Lens
Limited 3-Year Warranty
Table of Contents
6.4 x 4.8 mm (ø8 mm)
Iris: f/1.2 to f/16C Focus: 0.98' to infinity (0.3 m to infinity)
Iris / Focus / Zoom: Manual
Angle of View
1/2-type: 108.0° to 37.6° (D), 83.7° to 30.1° (H), 61.3° to 22.6°(V)
-4 to 122°F (-20 to 50°C)
Effective Lens Aperture
Front: ø19.9 mm Rear: ø9.9 mm
Back Focal Length
Tele: 16.5mm Wide: 8.5 mm
Flange Back Length
0.49" (12.5 mm)
M35.5 P= 0.5 mm
Object Dimensions at M.O.D.
At 4.5 mm: 21.14 x 14.01" (537 x 356 mm) At 12.5 mm: 6.33 x 4.72" (161 x 120 mm)