Axis Theia 5503-171 9-40mm Varifocal Telephoto Lens

Axis Theia 5503-171 9-40mm Varifocal Telephoto Lens

The Axis Theia CS-Mount 9-40mm DC-Iris Varifocal Telephoto Lens (5503-171) is a precision optical accessory engineered for Axis network camera systems. This lens delivers flexible focal length control and advanced light management, making it ideal for surveillance applications requiring variable coverage and adaptive lighting performance.

Key Features

• Varifocal Design: 9-40mm focal length range provides flexible field-of-view adjustment without changing lenses, adapting to diverse monitoring scenarios from wide coverage to detailed telephoto imaging
• DC-Iris Technology: Direct Current iris control ensures precise aperture management, maintaining optimal depth of field and image clarity across varying lighting conditions
• Day/Night Filter: Integrated mechanical filter automatically transitions between day and night modes, eliminating the need for manual adjustment and ensuring consistent image quality 24/7
• CS-Mount Compatible: Direct compatibility with Axis network cameras using CS-mount configuration for seamless integration and straightforward installation

Technical Highlights

The DC-iris mechanism provides automated exposure control that works in tandem with the camera's electronic imaging adjustments, optimizing light transmission and sensor utilization. The varifocal design eliminates the need for multiple fixed-focal-length lenses, reducing accessory inventory and installation costs. The day/night filter mechanism uses passive optical technology to shift spectral response without electrical components, ensuring reliability and maintenance-free operation.

Applications

This lens is suited for fixed-position surveillance installations where focal length adjustments are needed during setup or periodic reconfiguration. Ideal for perimeter monitoring, traffic analysis, and facility surveillance where both daytime and low-light performance are critical.