Wide Angle Lens – S03512809218F

S03512809218F – 3.5mm High-Resolution wide angle lens, 1/2.8″ Low F-number S-Mount Lens (F1.8), 116° 5-Megapixel resolution CCTV HD lens.

3.5mm 5MP M12 Wide Angle Lens

This 3.5mm 5MP M12 wide angle lens is designed for compact imaging systems that need broad scene coverage without sacrificing useful image resolution. Built for a 1/2.8″ image format, it provides a 116° diagonal, 92° horizontal, and 50° vertical field of view, making it suitable for monitoring and vision applications where a wide viewing area is required.

The combination of 5MP resolution, F1.8 aperture, M12×0.5 mount, and <-25% distortion provides a practical balance between wide-angle coverage and image performance. The fixed focal length configuration also simplifies optical integration into compact camera modules.

With a 0.3m minimum object distance and 5.4mm BFL, this lens can be used in relatively close-range imaging environments. It is well suited to smart security, embedded vision, robotics, industrial monitoring, and other space-constrained camera designs.

For additional compact optical options, see the TOWIN M12 Lenses collection.

M12 Wide Angle Lens Core Highlights

• 5MP Wide-Angle Imaging — Provides higher image resolution than conventional 2MP compact lenses while maintaining a broad field of view.
• 116° Diagonal FOV — Captures a large scene area from a short 3.5mm focal length, reducing the need for excessive camera-to-subject distance.
• F1.8 Aperture — Provides strong light-gathering capability for indoor monitoring and embedded vision environments.
• Controlled Wide-Angle Distortion — The specified distortion of <-25% offers a more balanced optical profile for applications requiring wide coverage with better geometric control than more extreme wide-angle designs.
• Compact M12×0.5 Interface — Supports integration into small camera modules and space-constrained optical assemblies.

M12 Wide Angle Lens Applications

Core Application Scenes

This lens is designed for applications where wide coverage, moderate optical distortion, and 5MP image resolution need to be combined in a compact camera system.

Typical applications include:

• Smart security and surveillance cameras
• Indoor area monitoring
• Embedded machine vision
• Robotics and mobile robot vision
• Industrial equipment monitoring
• Presence and object detection
• Smart home and IoT cameras
• Compact AI vision devices
• Short-range industrial imaging
• Wide-area monitoring systems

Designed for compact wide-angle monitoring and embedded vision applications, the lens provides a useful balance between scene coverage and image resolution.

Its 3.5mm focal length is particularly useful when the camera needs to capture a relatively large area without moving too far away from the target. The 0.3m minimum object distance further supports close-range monitoring and inspection environments.

For application-specific optical development, this lens can be considered for TOWIN’s Machine Vision and Robotics Vision solutions.

Compatible Device Types

The M12×0.5 mount makes this lens suitable for integration with a variety of compact camera platforms, including:

• 1/2.8″ CMOS camera modules
• 5MP embedded camera modules
• Compact IP camera systems
• Smart security camera modules
• Robotics vision cameras
• Industrial monitoring cameras
• Edge AI camera devices
• IoT vision equipment
• Embedded machine vision systems
• Compact inspection cameras

Before integration, the optical designer should verify sensor active area, mechanical clearance, flange requirements, and image quality across the intended operating range.

Wide-Angle Imaging Performance

The 3.5mm focal length provides a wide field of view while being less extreme than ultra-short focal length designs. With a 116° diagonal FOV, the lens can cover a substantial scene while maintaining a more controlled optical profile.

The specified <-25% distortion should be considered together with the 92° horizontal field of view. For applications where the visual geometry of objects or scene structures matters, this configuration may offer a more practical compromise than an ultra-wide lens with substantially higher distortion.

This makes the lens appropriate for applications such as indoor monitoring, compact robotics, equipment observation, and embedded vision where wide coverage is required but extreme fisheye-style imaging is unnecessary.

For engineers evaluating distortion against field of view, TOWIN’s Distortion Guide provides additional information for lens selection.

Aperture and Close-Range Imaging

The F1.8 fixed aperture provides a relatively large optical opening for a compact M12 lens. It can help maintain useful image brightness in indoor environments and other applications where available illumination is limited.

The 0.3m minimum object distance also makes the lens suitable for relatively close subjects. This can be useful for equipment monitoring, compact robotic platforms, indoor security, and short-distance inspection where the camera cannot be positioned far from the target.

The 5.4mm BFL should be matched with the mechanical design and sensor assembly during camera integration.

Frequently Asked Questions

Q: What type of lens is this 3.5mm M12 lens?

A: It is a fixed focal length M12 wide angle lens designed for 1/2.8″ camera sensors. It combines a 116° diagonal field of view with 5MP resolution for compact vision and monitoring systems.

Q: What is the field of view of the 3.5mm lens?

A: The lens provides a 116° diagonal field of view, 92° horizontal field of view, and 50° vertical field of view.

Q: Is the 3.5mm M12 lens suitable for 5MP cameras?

A: Yes. The lens is specified for 5MP imaging and a 1/2.8″ image format, making it suitable for compatible 5MP camera modules and embedded imaging systems.

Q: Is this a low-distortion M12 lens?

A: The lens has a specified distortion of less than -25%. Though distortion is better controlled than extreme wide-angle lenses, it is not a precision low-distortion lens for near-zero geometric distortion requirements.

Q: What is the minimum object distance?

A: The specified minimum object distance is 0.3m, allowing the lens to capture relatively close subjects in monitoring and embedded vision applications.

Q: Is the lens suitable for low-light imaging?

A: The F1.8 aperture provides good light-gathering capability for a compact M12 lens and can support indoor or moderately low-light applications. Final low-light performance also depends on the CMOS sensor, exposure settings, illumination, and image-processing system.

Q: What does the IRCF construction mean?

A: The specified optical construction is 6G + IRCF. Verify optical and filter setup with TOWIN per camera module and imaging needs, instead of presuming spectral correction capability.

Q: Can this 3.5mm M12 lens be customized for OEM projects?

A: TOWIN supports OEM/ODM optical development for different camera and imaging requirements. Customization options draw evaluation from sensor format, field of view, mechanical dimensions, working distance, resolution, distortion, and environmental requirements.

Related Optical Resources

Selecting the correct wide-angle lens requires matching the sensor size, focal length, field of view, resolution, and distortion to the actual camera application. TOWIN’s Sensor Guide can help engineers understand sensor and lens compatibility.

For broader optical selection considerations, see the Lens Selection Guide and Lens Basics.

If the required focal length needs to be determined from the sensor dimensions and target FOV, the Focal Length Calculator can be used as a preliminary design tool.

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