Orders placed after 4PM on weekdays will not ship until the next business day. Orders placed after 11AM Fridays will not ship until the following Monday.
Faster shipping methods may be available; just upgrade during checkout.
*Some exclusions apply.
Enter new zip code to refresh estimated delivery time.
The CS-Mount 8.5-40mm Varifocal Lens from Computar is designed for day/night cameras with 1/3" 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/1.3 to 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 1/3" sensors
8.5-40mm focal length translates into a zoom of approximately 5x
Aperture of f/1.3 to 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 produces corner-to-corner sharpness for all aperture settings
In the Box
computar CS-Mount 8.5-40mm Varifocal Lens
Limited 3-Year Warranty
Table of Contents
4.8 x 3.6 mm (ø6 mm)
Iris: f/1.3 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" (10.6mm) Wide: 0.35" (9.0mm)
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)