Vivotek AL-237 4.1-9mm Varifocal Lens F1.6

Vivotek AL-237 4.1-9mm Varifocal Lens F1.6

The Vivotek AL-237 is a professional-grade wide-angle varifocal lens designed for IP-based surveillance systems requiring flexible field-of-view adjustment and superior low-light performance. With a focal length range of 4.1–9mm and a bright F1.6 aperture, this lens delivers exceptional versatility for diverse security applications, from expansive indoor retail environments to outdoor perimeter monitoring.

Key Features

• 4.1–9mm Varifocal Range: Provides adjustable focal length to optimize coverage area and detail capture, allowing operators to tailor the field of view to specific site requirements
• F1.6 Bright Aperture: Maximizes light transmission for superior image quality in low-light and variable lighting conditions
• DC Auto-Iris Technology: Automatically regulates iris opening based on ambient light levels, maintaining consistent exposure and preventing overexposure or underexposure across changing conditions
• Wide-Angle Design: Captures expansive coverage areas ideal for monitoring large indoor and outdoor spaces without compromising image clarity
• High-Resolution Optimization: Engineered for compatibility with Vivotek IP cameras, ensuring sharp, detailed imagery across the full sensor
• Durable Construction: Built to perform reliably in both indoor and outdoor environments

Technical Specifications

• Focal Length: 4.1–9mm varifocal
• Maximum Aperture: F1.6
• Iris Control: DC auto-iris
• Form Factor: Wide-angle varifocal lens
• Compatible with: Vivotek IP cameras with DC-driven auto-iris support

Ideal Applications

The AL-237 is well-suited for retail stores, shopping centers, parking facilities, warehouses, outdoor public areas, and any environment where operators need flexible focal length adjustment combined with excellent low-light sensitivity. The varifocal design eliminates the need for multiple fixed-focal-length lenses, reducing inventory complexity and installation costs.

Why Choose the AL-237

This lens bridges the gap between fixed-focal and motorized zoom lenses, offering manual varifocal adjustment at a more accessible price point. The combination of wide-angle coverage, bright aperture, and auto-iris functionality makes it an ideal choice for security integrators and facility managers seeking reliable, versatile surveillance coverage without excessive cost or complexity.