CCTV Lens – D142812127F5IR

D142812127F5IR is High-Resolution 5 Megapixel CCTV lens, 1/2.7″ 2.8-12mm manual zoom and focus lens, F1.8 M14 mount lens, built-in IR cut switcher.

2.8–12mm 5MP M14 Zoom CCTV Lens with Built-in IR Cut Switcher

This 2.8–12mm M14 zoom CCTV lens is designed for 1/2.7″ cameras and supports up to 5MP resolution with a 100°–32° horizontal field of view. Its manual zoom and focus, fixed F1.8 aperture, 0.3m minimum object distance and built-in IR cut switcher make it suitable for adjustable CCTV and day/night surveillance systems.

M14 Zoom CCTV Lens Core Highlights at a Glance

• 2.8–12mm manual zoom range allows flexible framing from wide-area coverage to narrower monitoring.
• 5MP resolution supports higher-detail imaging for compatible 1/2.7″ camera systems.
• 100°–32° horizontal FOV provides a broad viewing range for different surveillance scenes.
• Built-in IR cut switcher supports day/night camera configurations requiring visible-light and infrared switching.
• M14 mount with 7.1–13.6mm BFL provides a specific mechanical configuration for compatible camera modules.

M14 Zoom CCTV Lens Applications

Core Application Scenes

This 2.8–12mm M14 zoom lens is designed for surveillance systems that require both wide-area coverage and adjustable framing from a single optical configuration.

At the 2.8mm wide end, the lens provides a 100° horizontal field of view, making it suitable for entrances, indoor rooms, corridors, retail areas and other scenes where broad coverage is required. When adjusted toward 12mm, the horizontal FOV narrows to approximately 32°, allowing the installer to focus the camera on a more specific area.

The 5MP resolution makes this configuration suitable for higher-detail CCTV systems using compatible 1/2.7″ sensors. The fixed F1.8 aperture provides a consistent optical aperture throughout the zoom range, while manual focus and zoom allow the installer to configure the image during installation.

A key feature of this model is the built-in IR cut switcher. Unlike an IR-corrected lens, an IR cut switcher is a mechanism used within the camera system to switch the IR-cut function between day and night operating modes. This makes the lens particularly relevant to surveillance cameras designed for day/night imaging.

The 0.3m M.O.D. allows the lens to focus on relatively close subjects, while the 7.1–13.6mm B.F.L. specification provides an important reference for mechanical and optical integration with the camera module.

Designed for 5MP CCTV and day/night surveillance applications where adjustable focal length, M14 mounting and integrated IR cut switching are required.

Compatible Device List

• 1/2.7″ CCTV cameras
• 5MP surveillance camera modules
• M14-compatible camera systems
• Day/night CCTV cameras
• Indoor security cameras
• Commercial surveillance cameras
• Retail monitoring systems
• Entrance and access monitoring cameras
• General-purpose video surveillance equipment

For other specialized mounting configurations, TOWIN’s Other Mount Lenses category provides additional optical solutions beyond standard C-Mount and CS-Mount systems.

Focal Length and Field of View Selection

The 2.8–12mm zoom range gives installers flexibility when the final surveillance framing needs to be adjusted after camera installation.

The wide end is useful when the camera needs to cover a large area, while the 12mm setting provides a narrower composition for a more focused monitoring zone.

For system planning, TOWIN’s FOV Calculator can help estimate the field of view based on sensor and focal-length requirements.

For projects where working distance and target size are already known, the Focal Length Calculator can help determine the appropriate focal-length range.

Built-in IR Cut Switcher for Day/Night Cameras

The built-in IR cut switcher is one of the key features of this M14 lens configuration.

In day/night surveillance systems, an IR-cut mechanism can be used to switch the camera between different operating modes depending on ambient illumination. During daytime operation, the IR-cut function helps control unwanted infrared wavelengths reaching the image sensor. During infrared-assisted night operation, the system can switch modes to allow infrared illumination to contribute to imaging.

This feature should be distinguished from IR correction. An IR cut switcher controls the transmission of infrared wavelengths, while an IR-corrected lens is an optical design intended to maintain focus consistency across different wavelengths.

For projects requiring additional infrared-related components, TOWIN also provides an IR Cut Filter Switcher Holder as part of its lens accessory range.

5MP Imaging and Optical Integration

The lens supports 5MP resolution and is designed around a 1/2.7″ image format, making it suitable for compatible high-resolution surveillance cameras.

The 7.1–13.6mm B.F.L. is particularly important when integrating the lens with a camera module. Back focal length affects the mechanical relationship between the lens and sensor, so the camera’s lens interface and sensor position should be checked before production integration.

The M14 mount also differentiates this model from standard CS-mount CCTV lenses. Camera manufacturers should verify the mechanical thread, sensor coverage and back focal requirements when selecting this lens for an OEM or camera-module project.

Wide-Angle Surveillance Considerations

With a 100° horizontal FOV at 2.8mm, this lens provides broad scene coverage without being classified as a fisheye lens.

The optical configuration is intended primarily for surveillance and general imaging rather than precision measurement. If an application requires accurate dimensional inspection or controlled geometric distortion, the lens should be evaluated against the application’s specific distortion and optical performance requirements.

TOWIN’s Distortion Guide provides additional information about how lens distortion can affect image geometry.

Frequently Asked Questions

Q: What camera format is this M14 lens designed for?
A: The lens is specified for a 1/2.7″ image format and uses an M14 mount. Check the camera for sensor coverage and mechanical compatibility before installation.

Q: What is the focal-length range?
A: The lens provides a 2.8–12mm manual zoom range, allowing the installer to adjust the viewing composition after mounting.

Q: What is the horizontal field of view?
A: The horizontal field of view ranges from approximately 100° at 2.8mm to 32° at 12mm.

Q: Is this an IR corrected lens?
A: No. The specification identifies a built-in IR cut switcher, which should not be confused with IR correction. IR correction refers to optical focus performance across different wavelengths, while an IR cut switcher controls infrared transmission in day/night camera operation.

Q: What is the maximum resolution of this lens?
A: The specified resolution is 5 Megapixels when used with a compatible 1/2.7″ camera system.

Q: What does the fixed F1.8 aperture mean?
A: The lens uses a fixed F1.8 aperture rather than an adjustable iris. The optical aperture stays fixed as users manually adjust the focal length and focus.

Q: What is the back focal length of this lens?
A: The specified B.F.L. range is 7.1–13.6mm. We consider this parameter when matching the lens to the camera module and sensor position.

Q: Is this lens a fisheye lens?
A: No. Although the lens provides a wide 100° horizontal field of view at 2.8mm, the available specifications identify it as a manual zoom lens rather than a fisheye lens.

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