CS-Mount Lens – CCL127028FMP

CCL127028FMP CCTV CS-mount lens low light F1.2 1/2.7″ wide angle lens 2.8mm IR corrected OV2715 day night fixed Iris

2.8mm CS-Mount Ultra Wide Angle F1.2 Lens

This 2.8mm CS-mount ultra wide angle lens is designed for 1/2.7″ sensors and delivers a 139° diagonal, 116° horizontal, and 63° vertical field of view. With a fast F1.2 aperture, 2MP resolution, and IR-corrected optical design, it is well suited to CCTV systems requiring wide-area coverage and improved imaging performance in low-light environments.

The combination of a short 2.8mm focal length and F1.2 aperture makes this lens particularly suitable for close-range surveillance, where a single fixed camera needs to cover a broad scene while maintaining useful image brightness under challenging lighting conditions.

CS-Mount Lens Core Highlights

• 2.8mm Ultra Wide Angle – Provides 116° horizontal FOV and 139° diagonal FOV for broad-area surveillance.
• Fast F1.2 Aperture – Helps collect more light for improved imaging in low-light CCTV environments.
• 2MP Resolution – Designed for surveillance systems requiring reliable standard high-definition image capture.
• IR Corrected Optical Design – Supports consistent focus performance across visible and near-infrared illumination.
• 0.3m Minimum Object Distance – Supports close-range monitoring where the camera must be positioned relatively near the monitored scene.

CS-Mount Lens Applications

Core Application Scenes

The 2.8mm focal length and 116° horizontal FOV make this lens particularly effective for short-distance surveillance where wide scene coverage is required. Unlike longer focal length CCTV lenses that concentrate on narrower areas, this configuration is designed to capture a much broader scene from a fixed camera position.

Its most distinctive advantage is the F1.2 aperture. The fast aperture makes this lens especially useful in environments where available light is limited, such as indoor facilities, entrances, corridors, retail spaces, and security areas operating during evening or nighttime conditions.

Typical application scenarios include:

• Retail store entrances – Capture customers entering and leaving while covering a broad doorway and surrounding area.
• Indoor low-light surveillance – Suitable for corridors, storage areas, facility rooms, and other locations with limited ambient illumination.
• Small shops and convenience stores – The 116° horizontal FOV can cover a large portion of the scene from a relatively short installation distance.
• Building lobbies and reception areas – Provide wide coverage of people movement around entrances and reception zones.
• Elevator and access areas – Suitable for monitoring relatively compact spaces where a broad viewing angle is required.
• Small parking and access zones – The wide diagonal FOV helps capture approaching people and vehicles within a short-range surveillance area.
• General indoor security systems – Suitable for fixed CCTV cameras that prioritize wide coverage and low-light performance.

Designed for low-light wide-angle CCTV applications, this lens is particularly appropriate when the installation requires a combination of broad coverage, short-range imaging, and a fast F1.2 aperture.

Compatible Devices

The lens can be integrated with:

• 1/2.7″ 2MP CCTV cameras
• CS-mount security cameras
• Indoor wide-angle surveillance cameras
• Low-light CCTV camera systems
• Retail security cameras
• Entrance and lobby monitoring cameras
• Facility and corridor surveillance cameras
• Small-area access monitoring systems

For additional professional surveillance configurations, explore CS-Mount Lenses to compare other focal lengths and optical specifications.

F1.2 Aperture for Low-Light CCTV

One of the key advantages of this lens is its F1.2 maximum aperture. A fast aperture is particularly valuable when the surveillance environment has limited ambient light, because the optical system can transmit more light to the image sensor compared with a slower-aperture configuration.

This makes the lens a practical choice for:

• Indoor areas with insufficient artificial lighting
• Evening surveillance
• Building entrances with changing illumination
• Retail environments operating after dark
• Security monitoring areas using supplementary lighting

The F1.2 aperture should be considered alongside the camera sensor’s sensitivity, exposure settings, and illumination system when optimizing overall low-light performance.

Ultra Wide Coverage for Close-Range Monitoring

With a 2.8mm focal length, the lens provides a 116° horizontal FOV and 139° diagonal FOV. This wide perspective allows a fixed camera to capture a substantial portion of the scene without requiring mechanical panning or multiple narrow-angle viewpoints.

The 0.3m M.O.D. also makes the lens suitable for relatively close installation scenarios where objects or people may appear near the camera.

For projects where field of view needs to be calculated from sensor size, installation distance, and target coverage, use the FOV Calculator to assist with preliminary lens selection.

Why Choose This 2.8mm CS-Mount Lens?

This lens is optimized around a different requirement from high-megapixel surveillance lenses: wide coverage and light-gathering capability in a compact fixed-focus configuration.

Its 2.8mm focal length provides a broad 116° horizontal viewing angle, while the F1.2 aperture makes it particularly suitable for surveillance environments where illumination may be limited. The 1/2.7″ format, CS mount, IR correction, and 0.3m M.O.D. further support integration into close-range CCTV camera systems.

For customized requirements involving focal length, sensor format, aperture, mount, infrared correction, or other optical characteristics, contact TOWIN for lens selection and OEM/ODM optical support.

Frequently Asked Questions

Q: What sensor size is this 2.8mm lens designed for?
A: This lens supports 1/2.7‑inch image sensors and delivers 2MP resolution.

Q: What is the horizontal FOV of this 2.8mm CCTV lens?
A: The lens provides a 116° horizontal field of view, with 139° diagonal and 63° vertical FOV.

Q: Why is the F1.2 aperture important for CCTV applications?
A: The F1.2 aperture is useful in low-light environments because its fast optical configuration can transmit more light to the camera sensor, supporting brighter surveillance images under suitable exposure conditions.

Q: Is this a fixed focal length lens?
A: Yes. The focal length is fixed at 2.8mm, so the lens does not provide optical zoom.

Q: What applications are suitable for this 2.8mm wide angle lens?
A: It is suitable for retail stores, entrances, lobbies, corridors, small shops, access areas, facility monitoring, and other close-range surveillance applications requiring broad coverage.

Q: Is this lens suitable for nighttime surveillance?
A: Yes. The F1.2 aperture supports low-light applications, while the IR-corrected design makes the lens suitable for CCTV systems using near-infrared illumination.

Q: What is the minimum object distance of this lens?
A: The specified M.O.D. is 0.3m, making it suitable for relatively close-range monitoring.

Q: Is this lens a fisheye lens?
A: No. Although the lens provides a very wide 139° diagonal FOV, the supplied specifications do not identify it as a fisheye lens. It should therefore be positioned as an ultra wide angle CCTV lens rather than a fisheye lens.

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