CCTV Lens – CCL1335M

CCL1335M is CCTV lens 1/3″ 35mm fixed zoom lens, F1.8 CS mount lens with Low F-number (Fast Lenses), manual iris and focus, VGA resolution.

For applications where field coverage needs to be evaluated before lens selection, the FOV Calculator can help estimate the relationship between focal length, sensor format, and viewing area.

35mm CS-Mount Fixed Focal CCTV Lens

This 35mm CS-mount fixed focal CCTV lens is designed for long-range, narrow-field imaging where stable framing and manual optical adjustment are required. With a 1/3″ image format, 7.7° horizontal field of view, F1.8 aperture, and 0.3m minimum object distance, it provides a practical solution for fixed-position surveillance and compact camera systems.

The manual iris and manual focus configuration gives system integrators direct control over exposure and focus, while the CS-mount lens interface makes it suitable for compatible CCTV camera platforms.

CS-Mount CCTV Lens Core Highlights

• 35mm Fixed Focal Length: Provides a stable optical configuration for fixed-view surveillance systems.
• 7.7° Horizontal FOV: Narrow-angle coverage is suitable for focused observation of specific areas rather than broad scene monitoring.
• F1.8 Aperture: A relatively fast aperture supports practical imaging performance in controlled or moderately challenging lighting conditions.
• Manual Optical Control: Manual iris and focus allow installers to fine-tune the lens according to the actual installation environment.
• CS-Mount Compatibility: Designed for compatible CS-mount CCTV cameras and compact security imaging equipment.

CS-Mount CCTV Lens Applications

Core Application Scenes

This 35mm CS-mount CCTV lens is optimized for applications that require a relatively narrow viewing angle and stable observation of a defined target area. Compared with wide-angle surveillance lenses, its 7.7° horizontal FOV concentrates the image on a smaller scene, making it useful when the camera needs to monitor a specific entrance, corridor, doorway, restricted zone, or distant fixed target.

Its manual focus and manual iris design also make it practical for installations where the camera position and lighting conditions remain relatively stable. Installers can manually adjust the optical settings during commissioning to achieve the desired image framing without requiring motorized zoom or autofocus mechanisms.

For system designers evaluating different focal lengths, the Lens Selection Guide provides useful guidance on matching lens characteristics with camera and application requirements.

Compatible Device List

• 1/3″ CCTV Cameras: Designed for compatible camera modules using a 1/3″ image format and CS-mount interface.
• Fixed Surveillance Cameras: Suitable for installations where the camera continuously observes a predetermined target or restricted area.
• Entrance & Access Monitoring Systems: The narrow FOV can help concentrate the image on doors, gates, checkpoints, and other defined observation zones.
• Indoor Security Cameras: Suitable for corridors, equipment rooms, controlled areas, and other indoor locations where broad panoramic coverage is not required.
• Custom Camera Assemblies: The CS-mount configuration allows integration with compatible industrial and security camera housings and imaging platforms.

Designed for fixed-position CCTV surveillance, access monitoring, and focused long-range observation applications.

For broader security requirements, this lens can be evaluated alongside TOWIN’s Smart Security solutions, where focal length and field of view are selected according to the required monitoring distance and coverage area.

Frequently Asked Questions

Q: What type of lens is this?

A: This is a 35mm CS-mount fixed focal CCTV lens designed for focused, narrow-angle imaging. Its fixed focal length provides a stable field of view without mechanical zoom adjustment.

Q: What camera sensor is this lens designed for?

A: The lens is specified for a 1/3″ image format. The actual camera and sensor combination should be checked during system design to ensure the required image coverage and compatibility.

Q: What does the 7.7° horizontal FOV mean?

A: The 7.7° horizontal field of view indicates relatively narrow scene coverage. This makes the lens more suitable for observing a specific target or defined area than for wide-area surveillance.

Q: Is the aperture adjustable?

A: Yes. The lens uses a manual iris, allowing the installer to adjust the aperture according to the lighting conditions and desired image exposure.

Q: Does this lens support autofocus?

A: No. The lens uses manual focus. The focus can be adjusted during installation and optimized for the required object distance.

Q: Is this a zoom lens?

A: No. It is a fixed focal lens with a 35mm focal length. The viewing angle remains fixed after installation.

Q: What is the minimum object distance?

A: The lens features a 0.3 m minimum object distance (MOD), supporting focused imaging starting at approximately 0.3 m within its standard optical configuration.

Q: Can this lens be used for customized CCTV camera systems?

A: The CS-mount configuration makes the lens suitable for compatible camera platforms and customized imaging assemblies. For specific mechanical, optical, or application requirements, contact TOWIN for compatibility and customization evaluation.

Related Lens Selection Resources

Choosing the appropriate focal length is important when designing a fixed-view camera system. The Lens Basics section explains fundamental optical parameters, while the Optical Design resources provide additional information for more demanding imaging projects.

For applications that require a different coverage range, you can explore the complete CS-Mount Lens range or compare other TOWIN lens products according to mount, focal length, sensor format, and application requirements.

Online contact