CCTV Lens – CS0412312F8

CS0412312F8 is High-resolution 8-Megapixel CCTV lens, 4mm focal length wide-angle lens, fixed aperture F1.2 CS mount lens, IR corrected.

For additional CS-mount optical configurations, engineers can explore Towin’s CS-Mount Lenses collection.

8MP 4mm CS-Mount Fisheye IR Corrected CCTV Lens

This 8MP 4mm CS-mount CCTV lens delivers an ultra-wide field of view of up to 145° diagonal on a 1/2.3″ sensor, with F1.2 aperture and IR-corrected optical performance. Designed for wide-area CCTV imaging, it provides expansive scene coverage from a single camera position where conventional wide-angle lenses may not capture enough of the surrounding environment.

CS-Mount CCTV Lens Core Highlights

• 145° diagonal FOV on 1/2.3″ sensors enables expansive single-camera coverage.
• 8MP resolution supports detailed wide-area surveillance imaging.
• F1.2 aperture provides a bright optical configuration for challenging lighting conditions.
• 4mm fisheye design delivers ultra-wide scene coverage from a compact CS-mount camera system.
• IR-corrected optics support consistent focus across visible and near-infrared imaging.

CS-Mount CCTV Lens Applications

Core Application Scenes

This 8MP CS-mount CCTV lens is designed for applications where maximizing the visible scene from a single camera is a primary requirement. Its 145° diagonal field of view on a 1/2.3″ sensor allows the camera to capture a substantially larger area than conventional fixed focal CCTV lenses.

It is particularly suitable for retail store surveillance, indoor public spaces, warehouse overview cameras, building entrances, lobby monitoring, parking-area observation, and wide-area security systems. In these environments, the fisheye perspective can reduce the number of cameras required to observe a large scene, depending on installation geometry and system requirements.

The lens is also suitable for ceiling-mounted panoramic surveillance, where a single camera is positioned above the monitored area and requires extensive horizontal and diagonal coverage. The 1/2.3″ sensor configuration provides the widest specified FOV, while the 1/2.7″ option offers a narrower 117° diagonal / 89° horizontal / 65° vertical field of view.

With an F1.2 aperture, the lens provides a bright optical configuration for indoor environments and other surveillance scenes where available illumination may vary. The IR-corrected design further supports day/night camera systems using near-infrared illumination.

For broader AI-enabled security applications, this lens can be integrated into Towin’s Smart Security solutions.

Compatible Device List

• 1/2.3″ 8MP CCTV cameras: Provides the maximum specified 145° diagonal field of view with compatible sensor dimensions.
• 1/2.7″ security cameras: Provides a 117° diagonal and 89° horizontal field of view for a somewhat narrower surveillance perspective.
• CS-mount camera systems: Designed for cameras using a standard CS mounting interface.
• Panoramic surveillance cameras: Suitable for wide-area indoor monitoring where a single camera needs extensive scene coverage.
• Retail and commercial security systems: Useful for monitoring shop floors, lobbies, reception areas, and other open spaces.
• Warehouse overview cameras: Suitable for capturing broad operational zones from elevated or centralized camera positions.
• Day/night CCTV systems: IR correction supports applications using near-infrared illumination.

Sensor & Field-of-View Selection

The available field of view changes significantly according to the sensor format:

• 1/2.3″ sensor: 145° diagonal / 105° horizontal / 74° vertical
• 1/2.7″ sensor: 117° diagonal / 89° horizontal / 65° vertical

This makes sensor compatibility an important consideration when integrating the lens into a camera module. Engineers should evaluate the actual sensor dimensions, image circle, desired scene coverage, and mounting position before finalizing the optical configuration.

Towin’s Sensor Guide can help engineers understand how sensor format affects lens selection and field of view.

For preliminary focal-length and coverage calculations, the Focal Length Calculator can also be used.

Fisheye Optical Considerations

Unlike a conventional wide-angle CCTV lens, this product is positioned as a fisheye lens because of its extreme field of view, particularly the 145° diagonal coverage available with a 1/2.3″ sensor.

The wide field of view comes with the characteristic geometric distortion associated with fisheye optics. Therefore, this lens is intended for applications where maximum scene coverage is more important than maintaining straight-line geometry across the entire image.

For applications where distortion control is a primary requirement, engineers should review the Distortion Guide before selecting the optical configuration.

Designed for high-resolution panoramic CCTV, retail surveillance, warehouse overview imaging, lobby monitoring, and wide-area security applications requiring ultra-wide fisheye coverage.

Frequently Asked Questions

Q: What type of lens is this 4mm CS-mount lens?
A: It is an 8MP fixed focal CS-mount fisheye lens with a 4mm focal length, F1.2 aperture, manual focus, and IR-corrected optical performance.

Q: What is the maximum field of view of this fisheye lens?
A: With a 1/2.3″ sensor, the specified field of view reaches 145° diagonal, 105° horizontal, and 74° vertical.

Q: How does the FOV change with a 1/2.7″ sensor?
A: With a 1/2.7″ sensor, the specified field of view is 117° diagonal, 89° horizontal, and 65° vertical.

Q: Is this lens suitable for panoramic surveillance?
A: Yes. Its ultra-wide field of view makes it suitable for panoramic and wide-area surveillance where a single camera needs to capture a large surrounding scene.

Q: Why is this lens classified as a fisheye lens?
A: The supplied specifications show an extremely wide field of view, reaching 145° diagonal and 105° horizontal on a 1/2.3″ sensor. This supports its fisheye positioning rather than a conventional wide-angle CCTV classification.

Q: What is the benefit of the F1.2 aperture?
A: F1.2 provides a bright optical configuration that can help support imaging in lower-light surveillance environments.

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

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 in day/night surveillance systems.

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