CS-Mount Lens – CCL1312MMP

CCL1312MMP CCTV lens 1/3″ 12mm low light F1.2 IR corrected CS-mount lens manual Iris day night surveillance

For more options, explore TOWIN’s CS-mount lens range or compare different focal lengths with the Lens Selection Guide.

12mm CS-Mount IR Corrected CCTV Lens

This 12mm CS-mount CCTV lens is designed for 1/3″ image sensors and delivers a 28.5° horizontal field of view for focused surveillance and target monitoring. With a fast F1.2 aperture, 3MP resolution, manual iris and focus, fixed focal length, and IR-corrected optical performance, it is well suited for security cameras that require clear and stable imaging across changing lighting conditions.

Product Core Highlights

• 12mm Fixed Focal Length – Provides a focused 28.5° horizontal field of view for monitoring defined areas and specific targets.
• 3MP Resolution – Supports detailed imaging for professional CCTV and security monitoring applications.
• F1.2 Wide Aperture – Provides strong light-gathering capability for indoor and low-light surveillance environments.
• IR Corrected Optical Design – Helps maintain consistent focus when cameras switch between visible-light and near-infrared illumination.
• Manual Iris & Manual Focus – Allows installers to optimize exposure and focus according to the actual surveillance environment.

CS-Mount CCTV Lens Applications

Focused CCTV Surveillance

The 12mm focal length and 28.5° horizontal field of view make this lens particularly suitable when the camera needs to concentrate on a defined monitoring area rather than cover a broad scene. Typical applications include entrances, corridors, gates, restricted areas, warehouses, production zones, and other fixed observation points.

Unlike wide-angle CCTV lenses designed for maximum scene coverage, this lens provides a more concentrated viewing angle that can help place greater visual attention on specific areas of interest.

Designed for focused CCTV surveillance applications where controlled field of view and target visibility are more important than ultra-wide coverage.

Low-Light Security Monitoring

The F1.2 aperture provides a relatively large light-gathering capability, making this lens suitable for surveillance environments where illumination can change throughout the day. It can be used in indoor monitoring, warehouse surveillance, building entrances, and other scenes where maintaining useful image brightness is important.

The combination of F1.2 aperture and 3MP resolution provides a practical balance between light collection and image detail for professional security camera systems.

IR-Assisted Day & Night Monitoring

The IR-corrected optical design is an important advantage for cameras that use infrared illumination at night. Visible light and near-infrared wavelengths can focus differently through conventional optical systems, potentially causing focus shifts when a camera changes between day and night operation.

This IR-corrected design helps maintain more consistent optical focus across visible and near-infrared imaging conditions, making the lens suitable for security cameras equipped with IR illuminators.

Close-Range and Controlled-Area Observation

With an M.O.D. of 0.2m, the lens can support relatively close-range monitoring while maintaining a focused viewing angle. This makes it useful for applications such as access control areas, equipment monitoring, indoor security zones, and close-proximity observation points.

Compatible Devices

This lens can be integrated with:

• CS-mount CCTV cameras
• 1/3″ security camera systems
• 3MP surveillance cameras
• IR-assisted day/night cameras
• Indoor security cameras
• Warehouse monitoring cameras
• Entrance and access-control cameras
• Industrial area monitoring cameras
• Fixed-position professional surveillance systems

For applications requiring different focal lengths or viewing coverage, users can refer to TOWIN’s Lens Selection Guide and FOV Calculator before selecting the final optical configuration.

Why Choose This 12mm CS-Mount CCTV Lens?

The main advantage of this lens is its combination of 12mm focal length, 28.5° horizontal FOV, F1.2 aperture, 3MP resolution, and IR correction. This configuration is particularly useful when a surveillance camera needs to monitor a defined area with a controlled viewing angle while maintaining reliable performance under variable lighting.

The CS mount also makes the lens suitable for interchangeable CCTV camera platforms, while manual iris and focus provide installers with direct control over optical setup during camera installation.

For customized optical requirements, including different focal lengths, sensor formats, FOV configurations, or mechanical interfaces, contact TOWIN’s optical engineering team for a lens solution tailored to your camera system.

Frequently Asked Questions

Q: What type of camera is this 12mm CS-mount lens designed for?
A: This lens is designed primarily for 1/3″ CS-mount CCTV and security cameras, particularly systems requiring a focused field of view for defined monitoring areas.

Q: What field of view does the 12mm lens provide?
A: The lens provides a 28.5° horizontal field of view, making it suitable for focused surveillance rather than wide-area scene coverage.

Q: Is this a fixed focal length CCTV lens?
A: Yes. The focal length is fixed at 12mm, so the viewing angle does not change through optical zoom.

Q: Why is IR correction important for CCTV cameras?
A: IR correction helps reduce focus shifts between visible-light and near-infrared imaging, which is especially useful for day/night security cameras using IR illumination.

Q: Is the aperture adjustable?
A: Yes. The lens uses a manual iris, allowing the installer to manually adjust the aperture according to the lighting conditions.

Q: What is the minimum object distance of this lens?
A: The specified M.O.D. is 0.2m, allowing the lens to be used for relatively close-range monitoring applications.

Q: Can this lens be used for industrial monitoring?
A: Yes. Its 12mm focal length, 28.5° horizontal FOV, 3MP resolution, and IR correction make it suitable for selected industrial monitoring applications where a focused viewing area is required.

Q: How should I select between a 6mm and 12mm CCTV lens?
A: A 6mm lens generally provides a wider viewing angle, while a 12mm lens offers a narrower, more focused field of view. The appropriate choice depends on camera distance, target size, sensor format, and required coverage. TOWIN’s FOV Calculator can help evaluate the required viewing geometry.

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