CCTV Lens – CCL13040CS

CCL13040CS is 4mm Day/night CCTV lens, F1.6 Low F-number CS mount lens (Fast Lenses), 1/3″ wide-angle lens, VGA resolution, IR corrected.

For additional fixed focal and professional surveillance configurations, engineers can explore Towin’s CS-Mount Lenses collection.

4mm CS-Mount IR Corrected Wide Angle Fixed Focal Lens

This 4mm CS-mount wide angle fixed focal lens provides a 66° horizontal field of view, F1.6 aperture, and IR-corrected optical performance for general CCTV and security imaging. Its simple fixed-focus configuration is suitable for surveillance cameras requiring stable wide-area coverage in compact monitoring installations.

Product Core Highlights

• 4mm fixed focal length provides stable framing for dedicated CCTV installations.
• 66° horizontal FOV delivers broad coverage for general-purpose surveillance.
• F1.6 aperture provides a relatively bright optical configuration for indoor monitoring.
• VGA imaging support fits standard-resolution security camera applications.
• IR-corrected optics support more consistent focus across visible and near-infrared wavelengths.

Applications & Compatible Devices

Core Application Scenes

This 4mm CS-mount wide angle lens is designed for cost-effective CCTV systems where reliable scene coverage and a stable viewing angle are more important than high-resolution machine vision performance. Its 66° horizontal field of view provides broad coverage while retaining a more conventional perspective than an ultra-wide or fisheye lens.

The lens is well suited to basic indoor security monitoring, building entrances, corridors, small retail areas, reception zones, and general-purpose surveillance cameras. The 4mm focal length allows the camera to capture a relatively large surrounding area without requiring motorized zoom or focus mechanisms.

The fixed focal configuration is particularly useful for installations where the camera position and monitoring area are predetermined. Once manually focused, the lens maintains a consistent optical configuration, making it suitable for simple fixed-position surveillance equipment.

Its F1.6 aperture and IR-corrected design also make it appropriate for CCTV systems that may operate under changing illumination or use near-infrared lighting for nighttime monitoring.

For selecting the appropriate sensor and focal-length combination, engineers can refer to Towin’s Lens Selection Guide.

Compatible Device List

• 1/3″ VGA CCTV cameras: Designed for standard-resolution camera modules using 1/3″ image sensors.
• CS-mount security cameras: Compatible with CCTV camera bodies using the CS mounting interface.
• Indoor surveillance cameras: Suitable for corridors, reception areas, entrances, offices, and small retail spaces.
• General-purpose security systems: Appropriate where broad coverage and a fixed viewing angle are sufficient.
• Day/night CCTV cameras: IR correction supports systems that use near-infrared illumination during nighttime operation.
• Compact monitoring equipment: The fixed focal configuration simplifies integration into dedicated camera assemblies.

For broader security applications, this lens can be evaluated with Towin’s Smart Security solutions.

Optical Selection Considerations

The 4mm focal length and 66° horizontal FOV provide a relatively broad viewing area for a CS-mount CCTV lens. The actual image coverage will depend on the camera sensor dimensions and installation distance.

Because this lens is specified for VGA resolution, it is best positioned for standard-resolution surveillance rather than applications requiring detailed megapixel inspection. Engineers should match the lens resolution capability with the actual camera sensor and system requirements.

For determining the required focal length based on working distance and desired coverage, the Focal Length Calculator can be used during preliminary system design.

No distortion specification is provided for this model, so it should not be classified as a Low Distortion Lens without additional optical test data. For applications requiring controlled geometric distortion, engineers can consult Towin’s Distortion Guide.

Designed for standard-resolution CCTV surveillance, indoor security monitoring, entrances, corridors, and general-purpose wide-angle camera systems.

Frequently Asked Questions

Q: What type of lens is this 4mm CS-mount lens?
A: It is a VGA fixed focal CCTV lens with a 4mm focal length, CS mount, F1.6 aperture, manual focus, and IR-corrected optical performance.

Q: What is the horizontal field of view of this lens?
A: The specified horizontal field of view is 66° when used with the stated 1/3″ image format.

Q: Is this 4mm lens a wide angle lens?
A: Yes. Its 66° horizontal field of view provides broad scene coverage, making it suitable for general wide-angle CCTV surveillance.

Q: Is this lens a fisheye lens?
A: No. Although it provides a relatively wide 66° horizontal field of view, the supplied specifications do not indicate the extreme field of view or pronounced distortion normally associated with a fisheye lens.

Q: Is the focal length adjustable?
A: No. The lens has a fixed 4mm focal length and fixed zoom configuration. Focus is adjusted manually during installation.

Q: What camera sensor is this lens designed for?
A: The specified image format is 1/3″, with VGA-resolution support.

Q: What does IR corrected mean?
A: IR correction is designed to reduce focus shifts between visible and near-infrared wavelengths, helping maintain more consistent focus when infrared illumination is used.

Q: What is the minimum object distance?
A: The specified M.O.D. is 0.1m, allowing the lens to focus on subjects positioned relatively close to the camera.

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