Low Distortion Lens – S04011808828

S04011808828 is Wide-angle 8-Megapixel low-distortion lens, suitable for 1/1.8″ and 1/2.8″ sensors, M12/S-Mount, 95°/77° F.O.V. F2.8 security surveillance.

4mm 8MP M12 Low Distortion Wide Angle Lens

This 4mm 8MP M12 low distortion lens is designed for compact vision systems that require wide-angle coverage with highly controlled image geometry. Supporting both 1/1.8″ and 1/2.8″ image formats, it delivers up to 95° diagonal FOV on a 1/1.8″ sensor while maintaining TV distortion below -0.5%.

With an M12×0.5 mount, F2.8 aperture, 0.2m minimum object distance, and 21.89mm TTL, this fixed focal lens provides a compact optical solution for embedded cameras, machine vision modules, robotics, smart monitoring, and other space-constrained imaging applications.

Product Highlights at a Glance

• < -0.5% TV distortion for highly accurate image geometry.
• 8MP resolution supports detailed imaging for advanced compact camera systems.
• Dual-format compatibility with 1/1.8″ and 1/2.8″ image formats.
• Up to 95° diagonal FOV provides broad scene coverage on 1/1.8″ sensors.
• Compact M12×0.5 design with 21.89mm TTL simplifies integration into embedded vision equipment.

4mm M12 Low Distortion Wide Angle Lens Applications

Core Application Scenes

This 4mm M12 low distortion lens is optimized for applications where a relatively wide field of view must be combined with accurate image geometry. Its TV distortion of less than -0.5% makes it particularly useful when straight edges, object proportions, and spatial relationships need to remain highly consistent across the image.

On a 1/1.8″ sensor, the lens provides an 88° horizontal FOV and 95° diagonal FOV, making it suitable for wide-area imaging in compact equipment without requiring an extreme fisheye optical design. On a 1/2.8″ sensor, the narrower 65° horizontal FOV provides a more focused viewing area while retaining the lens’s low-distortion characteristics.

The lens is well suited to compact machine vision cameras, robotics vision modules, embedded AI cameras, smart monitoring devices, access-control imaging systems, and industrial inspection equipment where installation space is limited but image geometry remains important.

For machine vision engineers, the combination of 8MP resolution and very low distortion can help reduce image deformation when software performs object measurement, positioning, recognition, or dimensional analysis. Engineers can also review Towin’s Lens Selection Guide when matching sensor format, focal length, working distance, and FOV.

Compatible Device List

• Compact Machine Vision Cameras: The 8MP resolution and < -0.5% distortion make this lens suitable for vision systems requiring accurate object positioning and image analysis.
• Embedded AI Vision Modules: Its compact M12×0.5 mount and 21.89mm TTL simplify integration into small camera housings and edge-AI devices.
• Robotics Vision Systems: The wide FOV on 1/1.8″ sensors allows robots to observe a broad workspace while maintaining controlled geometric distortion.
• Smart Monitoring Cameras: The lens provides wide scene coverage while avoiding the pronounced curvature commonly associated with fisheye optics.
• Industrial Inspection Devices: Low distortion helps preserve object proportions and straight-line geometry during visual inspection.
• OEM Camera Modules: The compact optical configuration can be integrated into customized camera assemblies where mechanical space and sensor compatibility are important.

When determining whether the 4mm focal length provides the required coverage, the FOV Calculator can be used to evaluate the relationship between sensor format, focal length, and field of view. For broader optical system requirements, Towin also provides Optical Design resources for lens integration and optical development.

Designed for low-distortion wide-angle machine vision, robotics, and compact embedded imaging applications.

Frequently Asked Questions

Q: What type of lens is this 4mm M12 lens?
A: It is a fixed focal, low distortion wide-angle M12 lens designed for compact imaging systems. It supports 1/1.8″ and 1/2.8″ image formats and provides up to 8MP resolution.

Q: How low is the distortion of this M12 lens?
A: The specified TV distortion is less than -0.5%, providing highly controlled image geometry for applications where accurate representation of object shapes and straight lines is important.

Q: What is the FOV of the 4mm lens?
A: On a 1/1.8″ sensor, the lens provides 95° diagonal, 88° horizontal, and 47° vertical FOV. On a 1/2.8″ sensor, the FOV is 77° diagonal, 65° horizontal, and 50° vertical.

Q: Is this lens suitable for machine vision?
A: Its 8MP resolution, very low distortion, wide FOV, and compact M12 mount make it suitable for selected machine vision applications, particularly compact inspection and positioning systems.

Q: What sensor sizes are compatible with this lens?
A: The specified image formats are 1/1.8″ and 1/2.8″. The actual imaging performance and FOV vary depending on the sensor format used.

Q: What is the minimum object distance?
A: The M.O.D. is 0.2m, allowing the lens to be used for relatively close-range imaging while maintaining a compact system configuration.

Q: Does this lens have IR correction?
A: The supplied specification states that the optical structure is without IRCF. Therefore, it should not be marketed as an IR Corrected Lens based on the available specifications.

Q: How do I select between the 1/1.8″ and 1/2.8″ sensor formats?
A: The choice depends on the camera’s sensor, required FOV, target size, and working distance. The Sensor Guide can help with sensor-format considerations, while Towin’s Focal Length Calculator can assist with focal-length selection.

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