

2.7-13mm CS-Mount IR corrected varifocal lens supports 1/2.5″ sensors, 3MP resolution and 114°-25° FOV with IR correction for security and industrial imaging.
CS271312514A3 is a 2.7-13mm CS-mount IR corrected varifocal lens. It is designed for 1/2.5″ sensor such as mt9p006,AR0521. And it is a 3 megapixel HD lens with Auto Iris F1.4 for low light IP camera. It is an Infrared lens for Day Night security video surveillance.
| IMAGE FORMAT | 1/2.5″ |
| FOCAL LENGTH | 2.7-13mm |
| H F.O.V. | 114°~25° |
| RESOLUTION | 3 MegaPixel |
| DISTORTION | -32%~-3% |
| APERTURE | F1.4-C |
| MOUNT | CS |
| IRIS | Auto |
| FOCUS | Manual |
| ZOOM | Manual |
| M.O.D. | 0.1m |
| IR | Corrected |
The 2.7-13mm CS-Mount IR corrected varifocal lens is designed for security surveillance, industrial monitoring and intelligent imaging systems requiring flexible field-of-view adjustment. Supporting 1/2.5″ image formats and 3MP resolution, this lens provides a horizontal field of view from 114° to 25°, allowing users to switch between wide-area monitoring and more focused scene observation.
The F1.4-C aperture range provides flexible light and exposure control, while the auto iris design helps maintain stable image brightness under changing lighting conditions. Manual focus and zoom adjustments allow users to configure the lens according to different working distances and monitoring requirements.
With IR correction, the lens helps maintain consistent focus when operating across visible and infrared illumination. The 0.1m minimum object distance also supports close-range imaging applications.
2.7-13mm Flexible Varifocal Range
The 2.7-13mm focal length range allows users to adjust the viewing angle according to different monitoring distances and scene coverage requirements.
114°-25° Wide-to-Narrow FOV
The horizontal field of view ranges from 114° to 25°, providing flexibility between broad-area surveillance and more focused image capture.
3MP Resolution Performance
Supporting 3MP resolution, the lens provides clear and detailed image output for security cameras, industrial monitoring and intelligent vision systems.
F1.4-C Aperture Range
The F1.4-C aperture range provides flexible exposure control and strong light-gathering capability for different illumination conditions.
IR Corrected Optical Design
The IR corrected design helps reduce focus shift between visible and infrared wavelengths, supporting more consistent image quality for day-and-night surveillance.
Auto Iris Control
The auto iris automatically adjusts aperture according to changing light conditions, helping maintain stable image exposure in variable environments.
Close-Range Imaging Capability
With a minimum object distance of 0.1m, the lens can support close-range monitoring and imaging applications.
Security Surveillance Cameras
This 2.7-13mm CS-Mount IR corrected varifocal lens is suitable for CCTV and professional surveillance systems requiring adjustable viewing angles.
Day-and-Night Security Systems
The IR corrected optical design makes the lens suitable for surveillance applications using infrared illumination during nighttime operation.
Smart Security Applications
The flexible focal length range supports intelligent monitoring systems where different viewing distances and coverage areas may be required.
Industrial Monitoring
The lens can be integrated into industrial cameras for equipment observation, facility monitoring and visual security applications.
Outdoor and Indoor Surveillance
The wide-to-narrow field of view allows the lens to adapt to different installation environments, from broad-area monitoring to more focused observation.
TOWIN provides professional optical solutions for CS-Mount lenses, varifocal lenses, IR corrected lenses and customized imaging systems. With optical design expertise, precision manufacturing capability and experience in security and industrial optics, TOWIN supports customers from optical development through mass production.
| TOWIN Capability | Customer Benefits |
|---|---|
| Professional optical design expertise | Optimized varifocal lens solutions for different monitoring requirements |
| Varifocal lens development experience | Flexible focal length solutions for wide and focused surveillance |
| IR optical technology | Improved focus consistency for visible and infrared imaging |
| OEM and ODM customization support | Flexible optical and mechanical customization |
| Precision manufacturing capability | Stable optical performance and consistent product quality |
| Strict quality control process | Reliable lenses for long-term security and industrial applications |
Q: What applications is the 2.7-13mm CS-Mount varifocal lens suitable for?
A: The 2.7-13mm CS-Mount varifocal lens is suitable for security surveillance, smart security, industrial monitoring and day-and-night imaging applications requiring flexible field-of-view adjustment.
Q: What is the advantage of a 2.7-13mm varifocal lens?
A: The 2.7-13mm focal range allows users to adjust the field of view from wide-angle coverage to a narrower viewing angle, making the lens adaptable to different monitoring distances.
Q: What sensor size is compatible with this CS-Mount lens?
A: This lens supports 1/2.5″ image formats and uses a standard CS-Mount interface for compatible security and industrial cameras.
Q: Why is IR correction important for surveillance lenses?
A: IR correction helps reduce focus shift between visible light and infrared wavelengths, helping maintain clearer and more consistent images during both daytime and nighttime operation.
Q: What is the benefit of the F1.4-C aperture range?
A: The F1.4-C aperture range provides strong light-gathering capability and flexible exposure control, helping the camera maintain suitable image brightness under different lighting conditions.
Q: Does this lens have automatic iris control?
A: Yes. The lens features an auto iris, which can adjust the aperture according to changing illumination conditions to help maintain stable image exposure.
Q: What is the minimum object distance of this lens?
A: The minimum object distance is 0.1m, allowing the lens to support relatively close-range monitoring and imaging applications.
Q: Can TOWIN customize CS-Mount varifocal lenses for specific projects?
A: Yes. TOWIN provides OEM and ODM customization services, including optical optimization, mechanical adjustments and customized varifocal lens solutions for different camera systems.
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