VIVOTEK AL-237 4.1-9mm F1.6 DC-Iris Varifocal Lens for 1/1.8" CS-Mount Cameras

Optimize coverage and image clarity in professional security deployments with the VIVOTEK AL-237 varifocal lens. Designed for 1/1.8" CS-mount cameras, this lens provides flexible framing with a 4.1–9mm focal range so integrators can quickly adjust field of view to suit entrances, corridors, retail floors or perimeter monitoring. The bright f/1.6 maximum aperture enhances low-light sensitivity for better nighttime capture and improved performance with video analytics. A DC iris maintains stable exposure as lighting changes, reducing false alarms and preserving usable detail in mixed indoor/outdoor scenes. Compact and durable, the AL-237 installs easily into existing camera systems and helps cut deployment time by avoiding multiple fixed lenses. Ideal for security, surveillance, and monitoring applications that demand dependable image quality and operational flexibility, the VIVOTEK AL-237 balances optical performance with practical installation benefits. Enhance your system’s coverage and low-light capability — order the AL-237 today for reliable surveillance across retail, transportation, and perimeter security installations.

• Versatile 4.1–9mm zoom lets you fine-tune field of view on-site to cover entrances, aisles, or perimeters without swapping lenses
• Bright f/1.6 aperture improves low-light performance for clearer video and more reliable analytics during night or dim conditions
• DC iris automatically stabilizes exposure in changing light for consistent image quality in outdoor and mixed-light environments
• Compact CS-mount design made for 1/1.8" sensors simplifies installation and retrofits into existing surveillance camera deployments
• Optimized optical performance delivers sharp detail across the zoom range, enhancing identification and monitoring outcomes