CCTV Lens – CCL121545MMP

CCL121545MMP is 15-45mm CCTV lens, 1/2″ manual zoom lens, F1.0 CS mount lens, IR corrected, 1.3-Megapixel resolution, suitable for low-light conditions.

15-45mm CS-Mount IR Corrected Zoom CCTV Lens

This 15-45mm CS-mount IR corrected manual zoom lens is designed for CCTV and security camera systems that require narrow-angle viewing and flexible long-range scene framing. With a 15-45mm focal range, 15° to 5° horizontal FOV, F1.0 maximum aperture, and IR corrected optical design, it provides a versatile solution for monitoring distant or specific targets under changing lighting conditions.

CS-Mount CCTV Lens Highlights at a Glance

• 15-45mm manual zoom range provides flexible narrow-angle framing for distant targets.
• 15° to 5° horizontal FOV enables broad-to-telephoto scene adjustment within one lens.
• F1.0 maximum aperture provides a bright optical configuration for challenging lighting conditions.
• IR corrected design supports consistent focus performance for visible and near-infrared imaging.
• CS mount provides compatibility with a wide range of CS-mount security cameras.
• 0.5m M.O.D. offers flexibility for applications requiring relatively close focusing despite the long focal range.

CS-Mount CCTV Lens Applications

Core Application Scenes

This 15-45mm CS-mount zoom lens is designed for surveillance systems where the camera needs to concentrate on a defined area rather than cover an entire scene with an ultra-wide viewing angle.

At the 15mm setting, the lens provides a 15° horizontal FOV, allowing the camera to capture a relatively concentrated scene while retaining some flexibility for wider target coverage. As the focal length increases toward 45mm, the horizontal FOV narrows to 5°, enabling the camera to focus on specific distant targets.

This focal range makes the lens particularly suitable for applications such as:

• Long-range CCTV surveillance
• Perimeter security monitoring
• Building and facility observation
• Parking area monitoring
• Entrance and gate surveillance
• Industrial facility security
• Restricted-area monitoring
• Distant target observation
• Day/night security camera systems

The F1.0 maximum aperture is especially relevant to surveillance installations where the camera needs to operate under lower available light. The lens can provide a bright optical configuration while retaining the flexibility of manual focal adjustment.

Designed for long-range CCTV and security applications requiring narrow-angle framing, bright F1.0 imaging, and IR-corrected optical performance.

For intelligent security applications, explore Towin’s Smart Security solution.

F1.0 Aperture for Challenging Lighting Conditions

The lens features a maximum F1.0 aperture, which provides a bright optical configuration for security imaging.

This can be particularly useful in surveillance environments where available illumination changes significantly between daytime and nighttime operation. A larger aperture allows more light to reach the camera sensor under equivalent exposure conditions, although actual low-light performance also depends on the sensor, exposure settings, illumination, and image-processing system.

The manual iris allows installers to adjust the aperture according to the actual scene and lighting environment.

For additional information about optical technologies and lens performance, visit Towin’s Optical Design resources.

IR Corrected Design for Day/Night CCTV

This model is explicitly specified as IR Corrected, making it suitable for security camera systems that operate across visible and near-infrared wavelengths.

In day/night CCTV systems, the camera may switch from visible-light imaging during the day to near-infrared illumination at night. Optical focus can shift between wavelengths if the lens is not designed to compensate for this behavior.

An IR corrected lens is designed to reduce wavelength-related focus variation, helping the camera maintain more consistent focus when switching between visible and near-infrared imaging.

This characteristic makes the lens particularly relevant to outdoor security, perimeter monitoring, and other surveillance systems requiring continuous operation under changing lighting conditions.

For related optical products, see Towin’s IR Corrected Lens category.

Frequently Asked Questions

Q: What type of lens is the 15-45mm model?
A: It is a CS-mount manual zoom lens designed primarily for CCTV and long-range security monitoring. It also features an IR corrected optical design.

Q: What is the focal length range?
A: The lens provides a manually adjustable focal length from 15mm to 45mm.

Q: What is the horizontal field of view?
A: The horizontal FOV ranges from 15° at the 15mm setting to 5° at the 45mm setting.

Q: Is this lens suitable for long-distance surveillance?
A: Yes. Its 15-45mm focal range and narrow 15°-5° horizontal FOV are suitable for surveillance applications requiring concentrated coverage of distant or specific targets.

Q: Is this lens IR corrected?
A: Yes. The specification explicitly states IR Corrected, making it suitable for day/night CCTV systems that use near-infrared illumination.

Q: What is the maximum aperture?
A: The maximum aperture is F1.0. The lens also uses a manual iris for aperture adjustment.

Q: What camera mount does this lens use?
A: The lens uses a CS mount and is designed for compatible CS-mount CCTV and box camera systems.

Q: What is the minimum object distance?
A: The specified M.O.D. is 0.5m. This allows the lens to support applications requiring focusing at relatively short distances despite its 15-45mm focal range.

Related Products & Resources

Towin provides several optical solutions for CCTV, surveillance, and adjustable focal-length applications:

• CS-Mount Lenses — explore the complete CS-mount lens range.
• IR Corrected Lens — explore lenses designed for visible and near-infrared imaging.
• Vari-Focal CCTV Lens — compare other variable focal-length CCTV solutions.
• Smart Security — learn about optical solutions for intelligent security applications.
• Lens Selection Guide — review the main parameters used when choosing a camera lens.
• FOV Calculator — evaluate field-of-view requirements for different focal lengths and sensors.

For customized CCTV lens requirements, including different focal ranges, aperture specifications, or mechanical configurations, contact Towin through the Contact page.

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