CS-Mount Lens – CCL132812AMPR2

1/3″ 2.8-12mm CS-mount varifocal CCTV lens with F1.4 aperture, DC auto iris and IR correction for flexible 2MP surveillance.

2.8-12mm CS-Mount Varifocal CCTV Lens for Wide-Area Surveillance

This 2.8-12mm CS-Mount varifocal CCTV lens is designed for security cameras that require flexible scene coverage, strong low-light performance, and adjustable image framing. With a 1/3″ image format, 2MP resolution, F1.4 aperture, DC auto iris, manual focus, manual zoom, and IR correction, it provides a practical optical solution for professional surveillance systems.

The 2.8-12mm focal length covers a horizontal field of view from 98° to 29°, allowing installers to move between broad-area monitoring and more concentrated observation without replacing the lens. The combination of F1.4 aperture and IR-corrected optics also makes this CS-Mount CCTV lens suitable for day-and-night security applications.

Product Core Highlights

• 2.8-12mm Varifocal Range – Provides a flexible 98° to 29° horizontal FOV for different surveillance distances and scene sizes.
• F1.4 Large Aperture – Provides strong light-gathering capability for surveillance environments where available illumination can vary.
• DC Auto Iris – Automatically regulates the amount of light entering the camera to support more consistent exposure under changing lighting conditions.
• IR Corrected Optical Design – Helps the lens operate across visible and infrared illumination, making it suitable for day-and-night CCTV systems.
• 0.3m Minimum Object Distance – Supports relatively close-range monitoring where the surveillance target may be positioned near the camera.

CS-Mount CCTV Lens Applications

The 2.8-12mm focal range makes this lens particularly useful when one camera needs to cover both a relatively broad scene and a more concentrated area. At 2.8mm, the 98° horizontal FOV is suitable for wider surveillance coverage, while the 12mm position narrows the view to 29° for more focused observation.

Designed for flexible CCTV surveillance applications, this lens can be used where installers need adjustable framing after installation. Manual zoom allows the viewing angle to be tuned according to the actual installation environment, while the F1.4 aperture provides useful light-gathering capability for indoor and outdoor security scenes.

Compatible Devices & Systems

• Professional CCTV Cameras – Suitable for CS-mount security cameras using a 1/3″ image format and requiring a 2MP-class lens.
• Retail Security Cameras – The wide 2.8mm setting can cover larger areas such as shop floors, entrances, and checkout zones, while longer focal lengths provide more focused views.
• Building & Office Surveillance – Useful for corridors, reception areas, entrances, and common areas where coverage requirements can vary by installation position.
• Parking & Access Monitoring – The adjustable focal length allows installers to balance overall scene coverage with more concentrated observation of vehicle entrances and access points.
• Warehouse & Facility Security – The 2.8-12mm range provides flexibility for monitoring both open areas and specific operational zones.
• Day & Night CCTV Systems – IR correction and DC auto iris make the lens suitable for surveillance systems that operate under changing visible-light and infrared conditions.

For selecting the appropriate focal length and viewing angle for a particular camera installation, refer to TOWIN’s Lens Selection Guide and use the FOV Calculator to estimate the required field of view.

For more CS-mount surveillance optics, explore TOWIN’s CS-Mount Lenses and the dedicated Vari-Focal CCTV Lens category.

Frequently Asked Questions

Q: What type of lens is the 2.8-12mm CS-Mount lens?
A: It is a CS-Mount varifocal CCTV lens with a 2.8-12mm focal length range, designed for surveillance systems that require adjustable viewing angles and flexible scene framing.

Q: Is this lens suitable for low-light CCTV surveillance?
A: Yes. The F1.4 maximum aperture provides strong light-gathering capability, making the lens suitable for CCTV systems operating in environments where lighting conditions may be limited or variable.

Q: What is the advantage of IR correction in this lens?
A: IR correction is designed to support more consistent optical performance when a surveillance camera operates under visible light and infrared illumination, which is particularly useful for day-and-night CCTV systems.

Q: What does the DC auto iris do?
A: The DC auto iris automatically adjusts the lens aperture according to the available light level, helping regulate the amount of light reaching the camera sensor as illumination changes.

Q: Can the focal length be adjusted after installation?
A: Yes. The lens features manual zoom, allowing the focal length to be adjusted between 2.8mm and 12mm to achieve the desired surveillance framing.

Q: What cameras are compatible with this lens?
A: The lens is designed for CS-mount CCTV cameras using a 1/3″ image format. The camera’s mechanical interface and sensor compatibility should be verified before installation.

Q: What applications are suitable for a 2.8-12mm varifocal CCTV lens?
A: Typical applications include retail surveillance, building security, entrances, parking areas, warehouses, access monitoring, and other scenes where adjustable coverage from wide-area observation to more focused monitoring is required.

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