Wide Angle Lens – S03912709014

S03912709014 is 3.9mm High-Quality wide-angle lens, Low F-number S-Mount Lens (F1.4), 3 – Megapixel resolution CCTV lens, Low Light Sensitive Lens.

3.9mm F1.4 M12 Wide Angle Lens

This 3.9mm 3MP M12 wide angle lens is designed for compact camera systems that require broad scene coverage together with a fast F1.4 aperture. Supporting both 1/2.7″ and 1/2.8″ image formats, the lens provides flexible compatibility for different compact CMOS camera modules.

At 3.9mm focal length, the lens delivers a 107° diagonal, 90° horizontal, and 47° vertical FOV on a 1/2.7″ sensor, while providing a 101° diagonal, 86° horizontal, and 45° vertical FOV on a 1/2.8″ sensor. This makes it suitable for applications that need wide-area imaging without moving to an extremely short focal length.

The F1.4 aperture is a key advantage for indoor and lower-light environments, helping the camera collect more light through the optical system. Combined with a 0.2m minimum object distance, the lens can support both general monitoring and relatively close-range imaging.

Its M12×0.5 mount and 5.39mm BFL make it suitable for compact embedded camera designs, industrial monitoring equipment, robotics platforms, and other space-constrained vision systems.

For more compact optical solutions, explore TOWIN’s M12 Lenses.

M12 Wide Angle Lens Core Highlights

• F1.4 Fast Aperture — Provides strong light-gathering capability for indoor, low-light, and variable-light imaging environments.
• Dual Sensor Compatibility — Supports both 1/2.7″ and 1/2.8″ image formats, providing greater flexibility when selecting a camera module.
• Wide-Angle Coverage — Delivers up to 107° diagonal FOV on a 1/2.7″ sensor while maintaining a practical 3.9mm focal length.
• Close-Range Imaging — The 0.2m minimum object distance supports applications where the camera must observe subjects at relatively short distances.
• Compact M12 Integration — The M12×0.5 mount and 5.39mm BFL are suited to compact camera and embedded vision assemblies.

M12 Wide Angle Lens Applications

Core Application Scenes

The optical configuration of this lens is particularly suitable for systems that need a wide field of view and high light-gathering capability in a compact package.

Typical applications include:

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

Designed for wide-angle embedded vision applications, this lens provides a practical combination of scene coverage, aperture performance, and compact mechanical integration.

The F1.4 aperture makes it especially useful in environments where lighting conditions can change throughout the day. Rather than relying solely on additional illumination, the optical system can provide a larger aperture for improved light collection.

For application development, this lens can be evaluated for TOWIN’s Machine Vision, Robotics Vision, and Smart Security applications.

Compatible Device Types

The lens can be integrated with compatible:

• 1/2.7″ CMOS camera modules
• 1/2.8″ CMOS camera modules
• 3MP embedded camera systems
• Compact IP camera modules
• Smart security cameras
• Robotics vision cameras
• Industrial monitoring cameras
• Embedded AI cameras
• IoT imaging devices
• Compact machine vision cameras

The dual image-format compatibility gives camera designers additional flexibility when selecting sensors for different hardware platforms.

Wide-Angle Performance Across Sensor Formats

One important feature of this lens is its support for two closely related sensor formats.

On a 1/2.7″ sensor, the lens provides:

• 107° diagonal FOV
• 90° horizontal FOV
• 47° vertical FOV

On a 1/2.8″ sensor, the field of view becomes:

• 101° diagonal FOV
• 86° horizontal FOV
• 45° vertical FOV

The difference is caused by the active imaging area of the sensor. Therefore, engineers should select the FOV specification corresponding to the actual sensor being used rather than assuming that the lens will produce the same viewing angle across both formats.

This flexibility is useful for camera platforms where the sensor supplier or camera architecture may vary between 1/2.7″ and 1/2.8″ formats.

For more information about matching lenses with sensors, refer to TOWIN’s Sensor Guide.

F1.4 Aperture for Challenging Lighting

The F1.4 aperture is one of the defining characteristics of this lens. A wider aperture allows more light to reach the image sensor, which can be particularly valuable in indoor environments, night-adjacent conditions, and locations where illumination is not fully controlled.

This makes the lens a practical option for applications such as indoor security, robotics, equipment monitoring, and embedded AI cameras where maintaining usable image brightness is important.

Actual low-light performance will still depend on the sensor’s sensitivity, exposure settings, image-processing algorithm, illumination conditions, and camera system design.

Distortion and Lens Selection

The specified distortion is <-29%, reflecting the wide-angle optical configuration of the 3.9mm lens. This is suitable for applications where broad scene coverage is more important than highly precise geometric reproduction.

For applications such as general monitoring, presence detection, robotics perception, and equipment observation, this level of wide-angle distortion may be acceptable depending on the image-processing requirements.

However, if the application involves dimensional measurement, precision inspection, or geometric analysis, engineers should evaluate distortion requirements more carefully and consider a dedicated low-distortion optical design.

TOWIN’s Distortion Guide can help when comparing wide-angle and low-distortion lens configurations.

Frequently Asked Questions

Q: What sensor formats are compatible with this 3.9mm M12 lens?

A: The lens is specified for both 1/2.7″ and 1/2.8″ image formats, giving camera designers flexibility when selecting compatible CMOS sensors.

Q: What is the FOV on a 1/2.7″ sensor?

A: On a 1/2.7″ sensor, the lens provides a 107° diagonal, 90° horizontal, and 47° vertical field of view.

Q: What is the FOV on a 1/2.8″ sensor?

A: On a 1/2.8″ sensor, the specified field of view is 101° diagonal, 86° horizontal, and 45° vertical.

Q: Why is the F1.4 aperture useful?

A: F1.4 provides a relatively large optical aperture, allowing more light to reach the sensor. This can benefit indoor and lower-light imaging applications, although final performance depends on the complete camera system.

Q: Is this a low-distortion lens?

A: The specified distortion is below -29%, so the lens offers a controlled wide-angle configuration but should not be considered a precision low-distortion lens. Applications requiring accurate geometric reproduction should use an optical design specifically optimized for low distortion.

Q: What is the minimum object distance of this lens?

A: The minimum object distance is 0.2m, allowing the lens to be used for relatively close-range imaging.

Q: Is this lens suitable for machine vision applications?

A: Yes. The compact M12×0.5 mount, wide field of view, F1.4 aperture, and 3MP resolution make it suitable for selected embedded machine vision, equipment monitoring, robotics, and industrial vision applications.

Q: Can TOWIN customize this M12 lens for an OEM project?

A: TOWIN supports OEM/ODM optical development based on project requirements. Sensor format, focal length, FOV, distortion, mechanical dimensions, working distance, and environmental conditions can be evaluated during the optical design process.

Related Optical Resources

Choosing an M12 lens requires matching the sensor format, focal length, field of view, resolution, and mechanical interface to the camera system. TOWIN’s Lens Selection Guide provides additional guidance for evaluating these parameters.

For basic optical concepts, visit Lens Basics.

If you need to determine a suitable focal length based on the sensor and target field of view, the Focal Length Calculator can be used for preliminary lens selection.

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