Vivotek AL-23A 2.7-13.5mm Varifocal Lens F1.6
The Vivotek AL-23A is a premium varifocal lens engineered for professional IP surveillance systems requiring flexible field-of-view coverage and reliable low-light performance. With a 2.7-13.5mm focal length range and bright F1.6 aperture, this lens delivers adaptable zoom capabilities and superior light gathering for diverse security applications.
Key Features
- Varifocal Range (2.7-13.5mm): Provides versatile focal length adjustment, enabling operators to customize field of view from wide-angle to moderate telephoto coverage without changing lenses
- F1.6 Bright Aperture: Maximizes light transmission for exceptional image clarity in challenging low-light and nighttime surveillance scenarios
- DC Auto-Iris: Automatically regulates iris opening to maintain consistent exposure and sharpness across varying lighting conditions, from bright daylight to dim interiors
- High Compatibility: Designed for Vivotek IP cameras and compatible systems with DC auto-iris connectors, ensuring seamless integration
- Durable Construction: Built with quality optical and mechanical components for reliable performance in demanding security deployments
- Optical Quality: Advanced lens design minimizes aberrations and delivers sharp, detailed imagery across the entire zoom range
Technical Highlights
The varifocal design allows security teams to adjust magnification and focus without lens replacement, reducing downtime and operational costs. The F1.6 aperture excels in environments with limited natural light, such as parking structures, building lobbies, and perimeter zones. The DC auto-iris mechanism continuously compensates for lighting changes, preventing overexposure or underexposure and maintaining consistent surveillance quality throughout the day and night.
Ideal Applications
Perfect for commercial, industrial, and institutional security installations where flexible coverage and low-light performance are essential. Suitable for building entrances, corridors, warehouse floors, outdoor perimeter monitoring, and mixed-lighting environments requiring adaptive focal length and aperture control.
Marty AllisonPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The AL-23A represents a practical choice for integrators deploying mid-range IP camera systems. The 2.7-13.5mm range covers common surveillance distances effectively—wide enough for lobby and corridor monitoring, yet telephoto enough for selective detail capture at moderate distances. The F1.6 aperture is competitive in the accessory lens market, delivering measurable light sensitivity gains over standard F2.0-F2.8 alternatives.
The DC auto-iris is essential for consistent image quality in mixed-lighting zones; without it, operators face constant manual exposure adjustment. Compatibility is straightforward for Vivotek systems but verify DC connector compatibility with third-party cameras. Build quality appears solid, though field longevity depends on environmental sealing and maintenance practices.
