

4mm 5MP M12 wide angle lens with 112° diagonal FOV, F1.8 aperture and M12×0.5 mount for compact CCTV, industrial and embedded vision systems.
CCL125040MPFR-High-Quality Wide-angle Lens Supplier, 4mm 5 Megapixel CCTV HD lens, 112° F1.8 M12/S-Mount Lenses with Low F-number (Fast Lenses).
| IMAGE FORMAT | 1/2.5″ |
| FOCAL LENGTH | 4mm |
| F.O.V.@1/2.5″ | 112°(D) |
| 86°(H) | |
| 63°(V) | |
| F.O.V.@1/2.7″ | 104°(D) |
| 88°(H) | |
| 48°(V) | |
| RESOLUTION | 5 MP |
| APERTURE | F1.8 |
| MOUNT | M12x0.5 |
| IRIS | Fixed |
| M.O.D. | 0.3m |
| T.T.L. | 23.3mm |
| STRUCTURE | 6G+IRCF |
This 4mm M12 wide angle lens is designed for compact camera systems that require broad scene coverage without the extreme distortion of a fisheye design. Supporting 5MP resolution, an F1.8 aperture, and up to 112° diagonal FOV on a 1/2.5″ sensor, it provides a practical balance between wide-angle coverage and image detail.
With an M12×0.5 mount, fixed iris, 0.3m minimum object distance, and 23.3mm TTL, this fixed focal lens is well suited to compact CCTV, embedded vision, industrial monitoring, and selected automotive camera applications.
This 4mm M12 wide angle lens is designed for applications requiring broad coverage while maintaining a more practical perspective than an extreme fisheye lens. Its 112° diagonal FOV on a 1/2.5″ sensor allows compact cameras to observe a relatively large area without requiring an excessively short focal length.
For compact CCTV and smart security cameras, the lens is suitable for monitoring entrances, corridors, offices, retail environments, small warehouses, and indoor public areas. The F1.8 aperture provides useful light-gathering performance when illumination varies throughout the day or between different indoor locations.
In embedded industrial vision, the compact M12 interface allows the lens to be integrated into space-constrained camera housings. Its wide field of view can be useful for equipment observation, workstation monitoring, robot-mounted cameras, and applications where the camera must capture both the target and its surrounding environment.
The 0.3m minimum object distance also provides flexibility for relatively close installation positions, making this lens suitable for near-field monitoring rather than only long-distance surveillance.
Designed for compact wide-area CCTV, embedded industrial vision, and near-field monitoring applications.
For engineers comparing sensor size and viewing coverage, the FOV Calculator can help evaluate the relationship between focal length, sensor dimensions, and field of view. The Sensor Guide can also be used when confirming lens and sensor compatibility.
For compact camera projects, TOWIN’s M12 Lenses provide additional M12 optical solutions. Customers developing industrial camera systems can also explore the Machine Vision solution range.
Q: What type of lens is this product?
A: This is a 4mm fixed focal M12 wide angle lens designed for compact camera systems requiring broad scene coverage.
Q: What is the field of view of the 4mm M12 lens?
A: On a 1/2.5″ sensor, the lens provides 112° diagonal, 86° horizontal, and 63° vertical FOV. On a 1/2.7″ sensor, it provides 104° diagonal, 88° horizontal, and 48° vertical FOV according to the supplied specifications.
Q: What resolution does this lens support?
A: The lens is specified for 5MP imaging, making it suitable for compact surveillance and embedded vision cameras requiring higher image detail.
Q: Is this lens suitable for CCTV cameras?
A: Yes. Its wide field of view and F1.8 aperture make it suitable for compact CCTV cameras used in indoor security and near-field monitoring applications.
Q: What sensor size is this lens designed for?
A: The primary image format is 1/2.5″, with an additional FOV specification provided for 1/2.7″ sensors.
Q: What is the minimum object distance of this lens?
A: The minimum object distance is 0.3m, allowing the lens to be used for relatively close-range monitoring and embedded imaging applications.
Q: Does this lens use a fixed or adjustable iris?
A: It uses a fixed iris with a maximum aperture of F1.8.
Q: Can TOWIN customize this M12 wide angle lens?
A: Yes. TOWIN supports OEM/ODM optical and mechanical customization for camera projects requiring specific optical performance, dimensions, or housing integration.
When selecting a wide angle lens, focal length should be evaluated together with sensor format and installation distance. This lens provides different FOV values on 1/2.5″ and 1/2.7″ sensors, so confirming the actual sensor before final optical selection is important.
For additional guidance, the Lens Selection Guide provides information on matching lens specifications to application requirements. Engineers can also use the Focal Length Calculator when determining the appropriate focal length for a specific camera installation.
For application development, this lens can support compact Smart Security, Machine Vision, and selected ADAS camera projects. For customized requirements, Contact TOWIN for optical engineering and OEM/ODM support.
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