C-Mount Lens – C041220PM1

C041220PM1 is 4mm C-Mount Megapixel Wide-angle CCTV lens 1/2″ C-mount 90°(D) F2.0 security surveillance lens.

4mm C-Mount 90° Wide Angle Megapixel Lens

This 4mm C-mount wide angle lens is designed for 1/2″ sensor imaging, providing a 90° diagonal, 78° horizontal, and 63° vertical field of view. With megapixel resolution, F2.0 aperture, manual iris, manual focus, and a 0.2m minimum object distance, it provides a flexible fixed-focal optical solution for industrial cameras, machine vision systems, and wide-area imaging applications.

Product Core Highlights

• 4mm focal length with 90° diagonal FOV provides broad scene coverage for 1/2″ sensor cameras.
• Megapixel resolution supports detailed imaging for general industrial and machine vision applications.
• F2.0 aperture provides a relatively bright optical configuration for indoor and controlled lighting environments.
• Manual iris and manual focus allow users to optimize exposure and focus according to the installation environment.
• C-mount interface provides compatibility with a wide range of industrial camera platforms.
• 0.2m M.O.D. supports relatively close-range imaging and inspection.

4mm C-Mount Wide Angle Lens Applications

Core Application Scenes

The combination of a 4mm focal length and 90° diagonal field of view makes this lens suitable for applications where a standard industrial lens would provide insufficient scene coverage. On a 1/2″ sensor, the 78° horizontal and 63° vertical FOV provide a broad viewing area while retaining the familiar C-mount format used by many industrial cameras.

For machine vision, this lens can be used when the inspection system needs to cover a relatively large working area without moving the camera farther away. The 4mm fixed focal length provides a straightforward optical configuration for systems where the camera-to-object distance remains relatively consistent.

The manual focus and manual iris provide useful adjustment during machine vision system installation. Operators can set the focus according to the working distance and adjust the iris to balance image brightness and depth of field for the specific inspection environment.

For industrial monitoring and inspection, the F2.0 aperture provides a relatively bright optical configuration, while the 0.2m M.O.D. supports applications where the camera is positioned relatively close to the target.

The C-mount interface also makes the lens suitable for industrial camera platforms where interchangeable optics are required. Its fixed zoom configuration avoids the mechanical complexity of a varifocal or motorized zoom lens.

Compatible Devices

This lens can be considered for:

• 1/2″ industrial cameras
• C-mount machine vision cameras
• Megapixel camera modules
• Industrial inspection cameras
• Factory monitoring cameras
• Embedded industrial imaging systems
• Wide-area inspection cameras
• Close-range inspection systems
• Manual-focus machine vision systems

Explore additional options in the C-Mount Lens product range.

For machine vision applications requiring different sensor formats and focal lengths, see the Machine Vision solution.

The Lens Selection Guide provides additional information for matching focal length, sensor format, and working distance.

For calculating the expected field of view for a particular camera configuration, use the FOV Calculator.

Designed for wide-angle industrial inspection and machine vision applications.

Frequently Asked Questions

Q: What sensor size is this 4mm C-mount lens designed for?
A: The lens is specified for a 1/2″ image format and provides a 90° diagonal, 78° horizontal, and 63° vertical field of view.

Q: Is this a wide-angle lens?
A: Yes. With a 90° diagonal FOV on a 1/2″ sensor, this 4mm lens is positioned as a wide-angle C-mount lens.

Q: Is this a fixed focal lens?
A: Yes. The focal length is fixed at 4mm and the specification lists the zoom configuration as Fixed.

Q: What does the manual iris provide?
A: The manual iris allows the user to adjust the aperture according to lighting conditions and imaging requirements. This can help balance image brightness and depth of field during system setup.

Q: Can this lens be used for machine vision?
A: Yes. Its C-mount interface, megapixel resolution, 4mm focal length, broad FOV, and manual optical adjustment make it suitable for various industrial machine vision and inspection systems.

Q: What is the minimum object distance?
A: The specified M.O.D. is 0.2m, allowing the lens to focus on targets positioned relatively close to the camera.

Q: Does this lens have autofocus?
A: No. The focus is manual, allowing the installer to set the focus according to the actual working distance.

Q: Is this a zoom lens?
A: No. The lens uses a fixed 4mm focal length. It does not provide variable focal length or optical zoom.

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