

3.2mm 3MP M12 wide-angle lens for IMX323 with 126° FOV, F2.2 aperture and wide horizontal coverage for security cameras.
S03212910422F is a 3.2mm wide-angle M12 wide-angle lens. It is for 1/2.9″ sensors like IMX323, OG02B10, PS1210K. It is a 3 Megapixel HD lens with short T.T.L. for Car driving recorder.
| IMAGE FORMAT | 1/2.9″ |
| FOCAL LENGTH | 3.2mm |
| F.O.V.(IMX323) | 126°(D) |
| 104°(H) | |
| 55°(V) | |
| RESOLUTION | 3 MegaPixel |
| DISTORTION | <36% |
| APERTURE | F2.2 |
| MOUNT | M12X0.5 |
| IRIS | Fixed |
| FOCUS | Manual |
| ZOOM | Fixed |
| T.T.L. | 17.82mm |
| CONSTRUCTION | 4G+IRF |
This 3.2mm M12 wide-angle lens is designed for compact camera systems that require a broad viewing angle, dependable 3MP imaging, and compatibility with the 1/2.9″ IMX323 sensor. It delivers a 126° diagonal F.O.V., 104° horizontal F.O.V., and 55° vertical F.O.V., providing strong horizontal scene coverage for monitoring and embedded vision applications. The F2.2 fixed aperture offers a practical balance between light transmission and compact optical design, while the M12x0.5 mount simplifies integration into small camera modules. With distortion below 36%, the lens is optimized for wide-area observation rather than precision measurement. The 17.82mm T.T.L. and 4G+IRF construction further support compact camera integration. Designed for wide-angle security and embedded camera applications, this lens is suitable for CCTV, smart security, vehicle monitoring, and intelligent camera systems.
For compact optical configurations, explore TOWIN’s M12 Lenses.
104° Horizontal Field of View
The 104° horizontal F.O.V. provides particularly broad side-to-side coverage, making this lens useful for monitoring areas where horizontal scene information is more important than extreme vertical coverage.
Optimized for IMX323
The lens is specified for the 1/2.9″ IMX323 sensor, providing a practical optical configuration for camera modules based on this widely used imaging format.
3MP Resolution
The 3MP optical performance provides clear image information for surveillance, monitoring, and embedded camera applications without requiring a larger industrial lens assembly.
Wide-Angle Imaging
The 3.2mm focal length provides a 126° diagonal F.O.V., allowing the camera to capture a large surrounding area from a relatively compact installation point.
Fixed F2.2 Aperture
The F2.2 aperture provides a balanced solution for general-purpose camera systems, combining practical light transmission with a compact optical structure.
Compact M12x0.5 Mount
The M12x0.5 interface makes the lens suitable for small board cameras, embedded monitoring equipment, and space-constrained camera housings.
4G+IRF Construction
The 4G+IRF optical construction combines a compact glass-element configuration with an infrared filtering component for visible-light camera applications.
CCTV Surveillance
The wide 104° horizontal FOV enables a single camera to monitor a broad area, making the lens suitable for indoor surveillance, entrances, corridors, commercial spaces, and general security monitoring.
For additional surveillance optics, explore Megapixel CCTV Lenses.
Smart Security Cameras
The compact M12 design and broad horizontal coverage make this lens suitable for smart security devices that need to capture people, objects, and surrounding environmental information.
Explore Smart Security Solutions for application-specific optical systems.
Vehicle & Road Monitoring
The wide horizontal viewing angle can be useful for compact vehicle cameras and monitoring systems that need to observe a broad area around the camera installation point.
For traffic-related optical applications, see TOWIN’s Smart Traffic Solutions.
Embedded Camera Modules
The combination of 1/2.9″ sensor compatibility, M12x0.5 mounting, and 17.82mm T.T.L. makes this lens suitable for compact embedded imaging devices.
AI Monitoring Systems
The wide-angle image provides a large amount of environmental information for AI-enabled cameras used for people detection, object detection, and scene monitoring.
Indoor Wide-Area Imaging
The 104° horizontal FOV is particularly useful for indoor environments where the camera needs to cover a relatively wide area from a fixed position.
Focal Length and FOV
At 3.2mm, this lens provides a 126° diagonal F.O.V., 104° horizontal F.O.V., and 55° vertical F.O.V. The relatively wide horizontal coverage makes it suitable for monitoring applications where side-to-side scene coverage is important.
Use TOWIN’s FOV Calculator to estimate the field of view for a specific sensor and working distance.
IMX323 Sensor Matching
This lens is designed for a 1/2.9″ image format and specified with the IMX323 sensor. Matching the optical image format with the camera sensor is essential to achieve the intended viewing angle and avoid image-circle limitations.
Learn more through the Sensor Guide.
Distortion Performance
The specified distortion is below 36%. This level is appropriate for wide-angle surveillance and environmental monitoring where broad coverage is a priority. It should not be considered a precision low-distortion optic for dimensional measurement.
For a deeper explanation of distortion, visit the Distortion Guide.
Aperture Performance
The F2.2 fixed aperture provides a practical optical balance for embedded camera systems. Actual low-light performance will depend on the IMX323 sensor, exposure configuration, illumination, and image-processing system.
IR Filter Configuration
The 4G+IRF construction incorporates an IR filtering element intended for visible-light imaging. This is different from an IR-corrected lens designed to maintain focus across visible and near-infrared wavelengths.
Mechanical Integration
With a 17.82mm T.T.L. and M12x0.5 mount, the lens is suitable for compact camera assemblies. During integration, the sensor position, housing dimensions, thread depth, and focus adjustment should be verified.
For additional optical selection guidance, see the Lens Selection Guide.
Q: What sensor is this 3.2mm M12 wide-angle lens designed for?
A: This lens is designed for a 1/2.9″ image format and is specified for the IMX323 sensor, with a 3MP optical resolution.
Q: Is this M12 wide-angle lens suitable for CCTV cameras?
A: Yes. Its 3.2mm focal length, wide horizontal FOV, 3MP resolution, and compact M12 mount make it suitable for a range of CCTV and smart security camera applications.
Q: Is the distortion below 36% suitable for machine vision?
A: It can be suitable for general machine vision tasks such as object detection or scene monitoring, but it is not intended for precision measurement. Applications requiring accurate dimensional analysis should consider a dedicated low-distortion lens.
Q: What does the IRF specification mean?
A: IRF indicates an infrared filtering component in the optical construction. It helps control infrared transmission for visible-light imaging and should not be confused with an IR-corrected lens.
Q: Does this lens have autofocus?
A: No. The lens uses manual focus with a fixed focal length and fixed aperture. Focus can be adjusted during camera assembly to match the required working distance.
Q: What makes this lens suitable for embedded cameras?
A: Its M12x0.5 mount, 17.82mm T.T.L., 1/2.9″ sensor compatibility, and wide-angle optical design make it well suited to compact board-camera and embedded imaging platforms.
Q: Can TOWIN customize this lens for another sensor or FOV?
A: Yes. TOWIN can evaluate OEM/ODM requirements including sensor format, focal length, FOV, distortion, optical construction, mechanical dimensions, and other project-specific specifications. Contact TOWIN for customization support.
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