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The computar H3Z4512CS-IR 1/2” Varifocal Day/Night Lens (4.5-12.5mm) is designed for CS-mount day/night cameras with 1/2” format sensors. This lens facilitates easy focal length adjustments without having to move the camera from its installation point. With an aperture of f/1.2 to 16C, the lens is suitable for surveillance in low-light as well as bright light conditions. In addition, this IR-corrected day/night 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 16C ensures enhanced performance in low-light as well as bright light conditions
Manual iris for correct exposures
Infrared correction eliminates focus shift and IR bleed, making the lens suitable for 24-hour surveillance operations
Aspherical lens surface ensures that the images reproduced have corner-to-corner sharpness for all aperture settings
6.4 x 4.8 mm (ø8 mm)
Iris: F1.2 to 16C Focus: 0.98' to infinity (0.3 m to infinity) Zoom: 0.17 to 0.49" (4.5 to 12.5 mm)
Iris: Manual 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: 0.64 (16.5 mm) Wide: 0.33" (8.5 mm)
Flange Back Length
0.49" (12.5 mm)
M35.5 P= 0.01" (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)