CCTV Lens – CS135011814A3

CS135011814A3 is 13-50mm 3 Megapixel CCTV lens, 1/1.8″ low distortion lens, DC auto iris, F1.4~F1.8 CS mount lens, IR corrected, suitable for low-light conditions.

13-50mm 3MP CS-Mount IR Corrected Zoom CCTV Lens

This 13-50mm 3MP CS-Mount zoom lens is designed for professional CCTV and security cameras using 1/1.8″ sensors. With F1.4–F1.8 aperture, DC auto iris, manual focus and zoom, and IR-corrected optics, it provides flexible image framing for surveillance scenes with changing distances and illumination.

CS-Mount CCTV Lens Core Highlights

• 13–50mm Manual Zoom Range — Adjust the viewing angle according to monitoring distance and scene size.
• 1/1.8″ Sensor Compatibility — Designed for CCTV cameras using 1/1.8″ image sensors.
• F1.4–F1.8 Aperture — Provides a relatively bright optical system for surveillance scenes with changing illumination.
• DC Auto Iris — Automatically adjusts the aperture according to incoming light levels.
• IR-Corrected Optics — Helps maintain focus consistency when surveillance systems operate across visible and near-infrared illumination.
• 0.3m Minimum Object Distance — Supports closer-range monitoring compared with many conventional surveillance zoom lenses.

Applications & Compatible Devices

Core Application Scenes

The 13–50mm focal-length range gives this lens flexibility between wider-area monitoring and narrower views of distant targets. At the 13mm end, it can cover relatively broad surveillance scenes, while the 50mm setting provides a narrower field of view for target observation.

The DC auto iris is suitable for surveillance installations where ambient illumination changes throughout the day. Combined with IR correction, the optical design can be integrated into day/night CCTV systems that use infrared illumination.

Typical applications include:

• Building entrances and access-control areas
• Commercial and industrial facility surveillance
• Parking lots and vehicle monitoring areas
• Warehouse and logistics facilities
• Perimeter surveillance
• Long corridor and passage monitoring
• Outdoor security camera installations
• Day/night professional CCTV systems
• Fixed surveillance points requiring variable framing

Designed for professional CCTV, security monitoring, and day/night surveillance applications.

Compatible Device List

• 1/1.8″ 3MP CCTV cameras
• CS-mount security cameras
• Day/night surveillance cameras
• IR-assisted CCTV cameras
• Professional video surveillance systems
• Fixed-position security cameras
• Commercial and industrial monitoring cameras
• Custom CCTV optical systems

For projects involving different sensor sizes, focal lengths, or mounting requirements, users can review the complete CS-Mount Lenses range or use the Lens Selection Guide to compare optical parameters.

For surveillance-system integration, the Smart Security Solutions section provides additional application information.

Frequently Asked Questions

Q: What type of camera is compatible with this 13–50mm lens?
A: This lens is designed for CS-mount CCTV cameras using a 1/1.8″ sensor and supporting up to 3MP resolution.

Q: Is this a fixed focal length lens?
A: No. It is a manual zoom lens with a focal-length range of 13–50mm, allowing the user to adjust the field of view according to the surveillance scene.

Q: What does IR corrected mean for this CCTV lens?
A: IR correction is designed to reduce focus shift between visible and near-infrared wavelengths, which is useful for day/night surveillance systems using IR illumination.

Q: Does this lens have an auto iris?
A: Yes. It uses a DC auto iris system that adjusts the aperture according to changes in illumination.

Q: Can the focus and zoom be adjusted manually?
A: Yes. Both focus and zoom are manually adjustable, allowing installers to configure the framing and focus during system setup.

Q: What is the minimum object distance of this lens?
A: The specified M.O.D. is 0.3m, allowing the lens to be used for relatively close surveillance scenes as well as longer-distance monitoring.

Q: What is the field of view of the 13–50mm zoom lens?
A: The diagonal field of view ranges from 38° at 13mm to 10° at 50mm. The horizontal field of view ranges from 33° to 8.5°, while the vertical field of view ranges from 20° to 5°.

Q: Can TOWIN provide customized lens solutions for CCTV projects?
A: TOWIN can evaluate customized optical requirements such as sensor format, focal length, mount, aperture, distortion and application environment. For project-specific requirements, contact the optical engineering team through the Contact page.

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