CCTV Lens – CS1212312F8

CS1212312F8 is 8 Megapixel CCTV HD lens, F1.2 CS mount lens with Low F-number (Fast Lenses), High-resolution low light sensitive lens, IR corrected.

This lens belongs to Towin’s CS-Mount Lenses range and can be evaluated alongside other CS-mount configurations when selecting a lens for a specific camera sensor and application.

8MP 12mm CS-Mount F1.2 IR Corrected CCTV Lens

This 8MP 12mm CS-mount CCTV lens is designed for high-resolution camera systems requiring a fast F1.2 aperture, stable fixed focal length, and IR-corrected optical performance. Supporting both 1/2.3″ and 1/2.7″ image formats, it provides controlled field of view for professional CCTV and industrial imaging applications.

IR Corrected CCTV Lens Core Highlights

• 8MP high-resolution imaging for detailed professional camera applications.
• 12mm fixed focal length provides consistent, repeatable scene framing.
• F1.2 fast aperture supports imaging in challenging or low-light conditions.
• IR-corrected optical design helps maintain focus consistency across visible and near-infrared wavelengths.
• CS-mount compatibility supports a wide range of professional CCTV and industrial camera platforms.

IR Corrected CCTV Lens Applications

Core Application Scenes

This 12mm CS-mount 8MP lens is designed for camera systems that require a controlled viewing angle rather than an ultra-wide field of view. With a 31° horizontal FOV on a 1/2.3″ sensor and 29° on a 1/2.7″ sensor, the lens provides a more focused perspective suitable for monitoring defined areas, entrances, production zones, equipment, and other scenes where excessive wide-angle coverage is unnecessary.

The F1.2 aperture is particularly valuable for applications where the camera must maintain useful image brightness under reduced illumination. Combined with IR correction, the lens can support imaging systems that operate across different lighting conditions, including cameras equipped with near-infrared illumination.

The fixed 12mm focal length also provides predictable framing from one installation to another. This makes the lens suitable for camera deployments where the viewing geometry is predetermined and installers prefer a stable optical configuration rather than adjustable zoom.

For projects involving different CS-mount lens configurations, Towin’s Lens Selection Guide can help engineers compare sensor size, focal length, field of view, and application requirements.

Compatible Device List

• 1/2.3″ 8MP camera systems: Provides a 31° horizontal field of view and 23° vertical field of view for controlled scene coverage.
• 1/2.7″ camera systems: Compatible with the smaller image format while maintaining an 8MP optical configuration.
• Professional CCTV cameras: The CS mount, fixed focal length, manual focus, and fixed iris suit conventional professional camera platforms.
• Low-light surveillance cameras: The F1.2 aperture allows more light to reach the image sensor compared with slower-aperture designs.
• IR-assisted camera systems: IR correction supports applications where near-infrared illumination is used for nighttime or low-light imaging.
• Industrial monitoring cameras: The 8MP resolution and controlled 12mm perspective can be useful for monitoring equipment, work areas, and defined inspection zones.

For industrial imaging projects requiring higher optical precision and application-specific lens selection, Towin’s Industrial Lens range provides additional high-resolution lens configurations.

Optical Selection Considerations

The field of view varies with sensor format. On a 1/2.3″ sensor, the lens provides 40° diagonal, 31° horizontal, and 23° vertical coverage. On a 1/2.7″ sensor, the corresponding values are 33°, 29°, and 16°. Engineers should therefore confirm the actual sensor format before finalizing the camera and lens combination.

Because this is a fixed focal lens, the 12mm focal length remains constant after installation. The resulting field of view is therefore determined primarily by the sensor format and mounting geometry. For projects where the required coverage needs to be calculated from the working distance, sensor size, and focal length, Towin’s FOV Calculator can assist with preliminary optical selection.

The IR-corrected design is also useful when the camera is expected to operate with both visible light and near-infrared illumination. For additional information about selecting optics for different sensor configurations, engineers can refer to the Sensor Guide.

Designed for high-resolution CCTV, low-light monitoring, and industrial imaging systems requiring a fixed 12mm perspective, fast F1.2 aperture, and IR-corrected performance.

Frequently Asked Questions

Q: What type of lens is this 12mm CS-mount lens?
A: It is an 8MP fixed focal CS-mount lens with a 12mm focal length, F1.2 aperture, manual focus, fixed iris, and IR-corrected optical performance.

Q: What sensors are compatible with this lens?
A: The lens is specified for both 1/2.3″ and 1/2.7″ image formats. The actual field of view changes according to the sensor format used.

Q: What is the field of view on a 1/2.3″ sensor?
A: On a 1/2.3″ sensor, the field of view is 40° diagonal, 31° horizontal, and 23° vertical.

Q: What is the field of view on a 1/2.7″ sensor?
A: On a 1/2.7″ sensor, the specified field of view is 33° diagonal, 29° horizontal, and 16° vertical.

Q: Is the 12mm lens a zoom lens?
A: No. It is a fixed focal lens. The focal length remains at 12mm, providing consistent framing after installation.

Q: What is the advantage of the F1.2 aperture?
A: F1.2 is a fast aperture that allows a relatively large amount of light to reach the sensor. This makes the lens suitable for camera systems operating in low or variable illumination.

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 image focus when IR illumination is used.

Q: What is the minimum object distance of this lens?
A: The specified M.O.D. is 0.3m, allowing the lens to focus on subjects from approximately 0.3 meters under the specified optical configuration.

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