Vivotek AL-248 12-50mm Telephoto Varifocal Lens F1.8

Vivotek AL-248 12-50mm Telephoto Varifocal Lens F1.8

The Vivotek AL-248 is a professional-grade telephoto varifocal lens engineered for long-range surveillance applications requiring precision identification and detailed monitoring. With its 12-50mm focal length range and fast F1.8 aperture, this lens delivers exceptional light-gathering capability and magnification control, making it ideal for security operations spanning large perimeter areas, parking lots, and public spaces where distant object recognition is critical.

Key Features

• 12-50mm Varifocal Range: Delivers 4.2x optical zoom for flexible framing of distant subjects without image quality loss
• F1.8 Fast Aperture: Maximizes light transmission for superior image clarity in low-light and variable lighting conditions
• P-Iris Technology: Provides precise, motorized iris control that enhances resolution, contrast, and depth of field consistency across focal length changes
• 1/1.7" Image Circle: Optimized for high-resolution camera sensors, ensuring edge-to-edge sharpness
• CS-Mount Interface: Direct compatibility with Vivotek IP camera systems supporting P-Iris functionality
• Durable Construction: Built for both indoor and outdoor deployments with environmental resilience

Technical Specifications

• Model: AL-248
• Focal Length: 12–50mm
• Maximum Aperture: F1.8
• Iris Type: P-Iris (motorized precision control)
• Mount Type: CS-Mount
• Image Circle: 1/1.7"
• Part Number: 640019900G

Supported Camera Models

The AL-248 is fully compatible with the following Vivotek IP camera platforms:

• IP816A-HP
• IP816A-LPC
• IP9181-H
• IP9191-HP
• IP9191-HT
• IP9165-HT-v2
• IP9165-LPC-v2

Applications

This telephoto lens excels in scenarios requiring extended focal length coverage:

• Perimeter and boundary monitoring
• Parking lot and vehicle identification
• Traffic and intersection surveillance
• Access point and entrance monitoring
• Large-scale facility and campus security
• Public space and event venue monitoring

Ted Perry

The AL-248 represents a strategic choice for organizations deploying high-resolution Vivotek cameras in wide-area surveillance scenarios. The combination of a 4.2x zoom range and F1.8 aperture creates significant operational flexibility—operators can frame wide scenes while maintaining the ability to zoom into specific subjects for identification-grade detail. P-Iris automation is particularly valuable in outdoor applications where lighting conditions fluctuate; the motorized iris continuously adjusts to maintain optimal exposure and contrast without operator intervention, reducing alert fatigue and improving detection reliability.

The 1/1.7" image circle is deliberately sized to support Vivotek's latest high-megapixel sensors, ensuring that telephoto magnification translates into genuine resolution gain rather than interpolated detail. For integrators, the CS-Mount standard and P-Iris protocol compatibility streamline camera selection and system configuration.