CCTV lens – CCL121545AMP

CCL121545AMP 15-45mm CS-mount varifocal CCTV lens with F1.0 aperture, DC auto iris and IR correction for long-range security surveillance.

15-45mm CS-Mount varifocal CCTV lens

This 15-45mm CS-Mount varifocal CCTV lens is designed for professional surveillance systems requiring flexible focal length adjustment, automatic iris control, and reliable imaging across changing lighting conditions. With F1.0 aperture, manual focus and zoom, DC auto iris, and IR correction, it provides a practical optical solution for security cameras that need to switch between broader scene coverage and detailed distant monitoring.

Its 15-45mm focal range delivers a horizontal field of view from 15° to 5°, making this CS-Mount CCTV lens particularly suitable for long-range surveillance, entrance monitoring, perimeter observation, and other applications where scene framing needs to be adjusted after installation.

Product Core Highlights

• 15-45mm varifocal range for flexible scene framing and surveillance distances.
• F1.0 aperture supports bright imaging in challenging low-light environments.
• DC auto iris automatically regulates light entering the camera for more consistent exposure.
• IR corrected optical design helps maintain focus when surveillance systems switch between visible and infrared illumination.
• CS mount compatibility makes it suitable for a wide range of professional security camera platforms.

CS-Mount Varifocal CCTV Lens Applications

Core Application Scenes

The long 15-45mm focal range makes this varifocal CCTV lens well suited to surveillance environments where operators need to balance overall scene coverage with detailed observation of specific areas. Compared with short focal length security lenses, its narrower 15° to 5° horizontal FOV allows the camera to concentrate on distant subjects, entrances, gates, corridors, and restricted areas.

For perimeter security, the lens can be adjusted to establish the required viewing area during installation without replacing the optical assembly. The manual zoom function also allows installers to fine-tune the framing according to the actual mounting distance and surveillance target.

In low-light security environments, the F1.0 aperture provides a strong light-gathering capability, while the IR corrected lens design helps maintain consistent optical performance when cameras use infrared illumination for nighttime monitoring.

Designed for long-range security surveillance, perimeter monitoring, entrance observation, and variable-distance CCTV applications.

Compatible Device List

• Professional CCTV Cameras: Compatible with CS-mount security camera platforms requiring a 1/2″ image format and varifocal focal range.
• Perimeter Surveillance Systems: Suitable for cameras monitoring fences, gates, restricted zones, industrial compounds, and other areas where distant subjects need to be observed.
• Entrance & Access Monitoring: The adjustable 15-45mm focal range allows installers to optimize framing for building entrances, loading areas, parking access points, and controlled entry zones.
• Night Surveillance Cameras: The F1.0 aperture and IR correction make the lens suitable for security cameras operating with infrared illumination during nighttime monitoring.
• Security Camera Upgrades: A practical choice for replacing or upgrading compatible CS-mount varifocal CCTV optics where flexible focal length adjustment is required.

For more information about TOWIN’s complete range of CS-Mount Lenses, visit the CS-Mount Lenses product category. For similar security-oriented options, the Vari-Focal CCTV Lens category provides additional varifocal solutions.

When selecting a surveillance lens, factors such as sensor format, focal length, field of view, and mounting distance should be considered together. TOWIN’s Lens Selection Guide provides additional guidance for choosing the appropriate optical configuration.

For systems that require a more detailed understanding of viewing coverage, the FOV Calculator can help engineers evaluate the relationship between focal length, sensor size, and field of view.

Frequently Asked Questions

Q: What type of lens is the 15-45mm CS-Mount lens?

A: It is a CS-Mount varifocal CCTV lens with a 15-45mm focal range, designed for surveillance applications requiring adjustable viewing angles and flexible scene framing.

Q: What is the field of view of this CCTV lens?

A: The horizontal field of view ranges from 15° at 15mm to 5° at 45mm. The shorter focal length provides broader coverage, while the longer focal length provides a narrower view for more concentrated observation.

Q: What is the benefit of IR correction in this lens?

A: IR correction helps maintain more consistent focus and image sharpness when the surveillance camera operates under both visible light and infrared illumination, which is particularly useful for day-and-night CCTV systems.

Q: What does DC auto iris do?

A: DC auto iris adjusts the lens aperture according to the available light level, helping regulate exposure when the camera moves between brighter and darker surveillance conditions.

Q: Can the 15-45mm focal length be adjusted after installation?

A: Yes. The lens features manual zoom, allowing installers to adjust the focal length between 15mm and 45mm to achieve the required surveillance framing.

Q: What cameras are compatible with this lens?

A: The lens is designed for compatible CS-mount CCTV cameras using a 1/2″ image format. Camera sensor size, flange distance, and mechanical compatibility should be verified before installation.

Q: What applications are best suited to a 15-45mm varifocal CCTV lens?

A: It is particularly suitable for perimeter surveillance, entrance monitoring, gates, restricted areas, parking access points, and other scenes where distant targets require adjustable framing.

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