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The computar T5Z8513CS-IR 1/3” Varifocal Day/Night Telephoto Lens (8.5-40mm) helps you closely examine all activities in your premises. It is designed for use with CS-mount day/night cameras with 1/3” format sensors. This lens facilitates easy focal length adjustments without having to move the camera from its installation point.
With an aperture of f/1.3 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 1/3" sensors
8.5-40mm focal length translates into a zoom of approximately 4.7x
Aperture of f/1.3 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
4.8 x 3.6 mm (ø6 mm)
Iris: F1.3 to 16C Focus: 2.62' to infinity (0.8 m to infinity) Zoom: 0.33 to 1.57" (8.5 to 40 mm)
Iris: Manual iris Focus / Zoom: Manual
Angle of View
1/3-type: 43.9 to 8.9° (D), 33.5 to 7.1° (H), 24.4 to 5.3° (V) 1/4-type: 31.2 to 6.7° (D), 24.4 to 5.3° (H), 17.4 to 3.8° (V)
-4 to 122°F (-20 to 50°C)
Effective Lens Aperture
Front: ø27.0 mm Rear: ø9.3 mm
Back Focal Length
Tele: 0.41" (10.6 mm) Wide: 0.35" (9.0 mm)
Flange Back Length
0.49" (12.5 mm)
M37.5 P= 0.01" (0.5 mm)
Object Dimensions at M.O.D.
At 8.5 mm: 18.93 x 13.58" (481 x 345 mm) At 40 mm: 3.93 x 29.52" (100 x 750 mm)