AXIS 3.90-10 mm F/1.5 Varifocal CS-Mount Lens

This AXIS 3.90-10 mm f/1.5 Varifocal CS-Mount Lens is engineered to elevate security camera imaging with precise iris control, superior contrast, and razor-sharp clarity across a flexible zoom range. Designed to address the shortcomings of auto-iris systems, this lens delivers consistent exposure and enhanced depth of field from wide-angle to telephoto settings. Its IR-corrected optical design combines a bright f/1.5 aperture with meticulous optics to maintain high image quality in both visible light and infrared illumination. Suitable for CS-mount security cameras and cameras supporting sensors up to 1/1.8", this lens balances exceptional performance with dependable build quality, making it a trusted choice for entrances, lobbies, hallways, and outdoor perspectives where clear, actionable footage matters.

• Precise iris control for consistent exposure across the entire zoom range. By mitigating the imperfections of auto-iris lenses, the AXIS 3.90-10 mm lens preserves contrast and sharpness whether you’re zoomed in on a face at 10 mm or scanning a wide scene at 3.9 mm, helping you capture usable footage in challenging lighting.
• IR-corrected optical design that enhances performance in infrared and low-light conditions. The lens maintains high contrast and clarity when IR illumination is in play, reducing ghosting and improving object detail at night or in backlit environments, which is essential for reliable security monitoring after dark.
• Versatile 3.9-10 mm focal length (varifocal) covers wide-to-tele framing without swapping lenses. This range is ideal for doorways, corridors, parking angles, and entryways, allowing precise framing adjustments to capture essential details such as faces, license plates, or activity zones with consistent image quality.
• CS-mount compatibility with sensors up to 1/1.8". The lens integrates smoothly with a broad range of CCTV and network cameras that use CS-mount geometry, enabling streamlined installation and broad compatibility across security systems.
• Optimized for high-resolution imaging with improved contrast, resolution, and edge-to-edge sharpness. The combination of a fast F/1.5 aperture and careful optical engineering yields crisp, low-distortion imagery across the full zoom range, helping operators identify details with confidence in real-world surveillance scenarios.

Technical Details of AXIS 3.90-10mm Varifocal CS-Mount Lens

• F-number (aperture): F/1.5
• Focal length: 3.9-10 mm
• Lens type: Varifocal
• Mount: CS-mount
• Iris: Manual iris with precision control
• Sensor compatibility: Supports sensors up to 1/1.8"
• Optical design: IR-corrected

how to install AXIS 3.90-10mm F/1.5 Varifocal CS-Mount Lens

• Power down the camera system before performing any lens installation or replacement.
• Remove the existing lens or detach the mounting hardware according to the camera manufacturer’s instructions.
• Gently align the AXIS lens with the CS-mount threads, ensuring the lens is oriented correctly to avoid binding or misalignment.
• Insert the lens into the CS-mount and secure it with the mounting ring or screws provided, taking care not to overtighten and to maintain proper alignment with the sensor plane.
• Power on the camera and adjust focus, zoom, and iris to achieve the desired framing and exposure. Use the camera’s live view to fine-tune focus across the 3.9 mm to 10 mm range and set iris for consistent brightness across lighting conditions.
• Test the setup under varying lighting—including backlit entrances and dim corridors—and verify image quality, ensuring sharpness and contrast remain stable as you transition between focal lengths.

Frequently asked questions

• Q: What is the focal range of this lens? A: The AXIS lens features a varifocal 3.9-10 mm focal length, allowing flexible framing from wide to tele perspectives without lens changes.
• Q: What mount does it use? A: It uses a CS-mount, designed for compatibility with a wide range of CS-mount surveillance cameras and accessories.
• Q: What sensors does it support? A: It supports sensors up to 1/1.8" in size, making it suitable for compact security cameras and many standard-definition to high-definition devices.
• Q: Is the lens IR-corrected? A: Yes. The IR-corrected design helps maintain contrast and clarity under infrared illumination, improving night-time visibility.
• Q: Does it offer iris control? A: The lens provides precise iris control to optimize exposure and depth of field across the zoom range, addressing the limitations of auto-iris systems for more consistent and repeatable results.