CCTV Lens – CCL1272812AMPR

1/2.7″ 2.8-12mm F1.4 CCTV CS-mount Lens

• For 1/2.7″ sensor and 1/3′ sensor, for exmaple OV2715
• Vari focal Length 2.8-12mm
• IR Correct lens, good for Day & Night surveillance
• Low Light Sensitive , aperture F1.4
• DC Auto Iris, manual Iris/P iris also available
• Suitable dimension, elegant for brand camera like Hikvision ,Dahua box camera
• Same sereis, 1/2.7″, 5-50mm, 6-60mm lens  avaiable

2.8-12mm CS-Mount 3MP Varifocal CCTV Lens

This 2.8-12mm CS-Mount CCTV lens is designed for surveillance systems that require flexible scene coverage, reliable low-light imaging, and adjustable focal length. With 3MP resolution, a fast F1.4 aperture, DC auto iris, manual focus and zoom, and IR correction, it provides a versatile optical solution for professional security cameras.

The 2.8-12mm focal range delivers a horizontal field of view from 109° to 31°, allowing the same lens to cover wide-area scenes at 2.8mm and provide more concentrated monitoring at 12mm. Its 1/2.7″ image format and 0.3m minimum object distance make it suitable for a broad range of indoor and outdoor surveillance installations.

Product Core Highlights

• 2.8-12mm flexible focal range — Covers wide-area monitoring at 2.8mm and narrower surveillance views at 12mm.
• 109°~31° horizontal FOV — Provides broad scene coverage while retaining the ability to concentrate on specific areas.
• F1.4 fast aperture — Provides strong light-gathering capability for surveillance scenes with changing or limited illumination.
• DC auto iris — Automatically regulates the aperture according to lighting conditions to support consistent exposure.
• IR corrected optical design — Suitable for day-and-night CCTV systems using both visible and infrared illumination.

CS-Mount Varifocal CCTV Lens Applications

The 2.8-12mm focal range makes this lens particularly useful when a surveillance installation needs both broad scene coverage and adjustable framing. At 2.8mm, the 109° horizontal FOV can cover entrances, rooms, corridors, retail areas, parking zones, and other relatively broad scenes. Moving toward 12mm narrows the viewing angle to 31°, allowing the installer to concentrate the camera view on a more specific monitoring area.

The F1.4 aperture is well suited to surveillance environments where illumination can change throughout the day. Combined with DC auto iris, the lens is designed to adapt to different brightness levels without requiring constant manual aperture adjustment. IR correction further supports day-and-night surveillance configurations where infrared illumination is used after dark.

Designed for flexible CCTV surveillance application, this CS-Mount zoom lens can be used where one optical configuration needs to support different monitoring distances and scene sizes. The 0.3m M.O.D. also allows relatively close subjects to be monitored without requiring a separate close-focus lens.

Compatible Devices and Systems

• Professional CS-Mount CCTV Cameras — Suitable for security cameras using a 1/2.7″ image format and compatible CS-mount interface.
• Indoor Security Cameras — The 2.8mm wide-angle position is suitable for rooms, corridors, entrances, retail spaces, and reception areas.
• Parking & Perimeter Surveillance Cameras — The adjustable 2.8-12mm range allows installers to balance overall coverage with more concentrated observation.
• Building Entrance Monitoring Systems — The wide FOV helps cover access areas while the longer focal length can provide a tighter view when required.
• Day & Night CCTV Systems — IR correction and DC auto iris support surveillance systems operating across changing lighting conditions.

For selecting the appropriate focal length, sensor format, and field of view for a surveillance camera, refer to TOWIN’s Lens Selection Guide. You can also use the FOV Calculator to evaluate how focal length affects scene coverage.

For more options with similar mechanical configurations, explore TOWIN’s CS-Mount Lenses and Vari-Focal CCTV Lens range.

Frequently Asked Questions

Q: What type of lens is the 2.8-12mm CS-Mount lens?
A: It is a 3MP CS-Mount varifocal CCTV lens with manual zoom, manual focus, DC auto iris, F1.4 aperture, and IR correction for professional surveillance applications.

Q: What is the field of view of this 2.8-12mm CCTV lens?
A: The horizontal field of view ranges from 109° to 31°. The 2.8mm setting provides the widest viewing angle, while the 12mm setting provides a narrower and more concentrated view.

Q: Is this lens suitable for wide-angle surveillance?
A: Yes. At 2.8mm, the lens provides a 109° horizontal FOV, making it suitable for entrances, indoor spaces, parking areas, and other scenes requiring broad coverage.

Q: Is the 2.8-12mm lens suitable for low-light CCTV applications?
A: Yes. Its F1.4 maximum aperture provides strong light-gathering capability, making it suitable for surveillance environments with limited or changing illumination.

Q: What is the benefit of the DC auto iris?
A: DC auto iris automatically adjusts the lens aperture according to the available light, helping the camera manage exposure when surveillance conditions change from brighter to darker environments.

Q: What does IR correction mean for this CCTV lens?
A: IR correction is intended to support consistent focusing when a surveillance camera operates under visible light and infrared illumination, which is particularly useful for day-and-night CCTV systems.

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 required surveillance framing.

Q: What cameras are compatible with this lens?
A: The lens is designed for compatible CS-Mount CCTV cameras using a 1/2.7″ image format. Camera mechanical dimensions and optical compatibility should be verified before installation.

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