

5.9mm M9 5MP wide angle industrial lens for 1/2.5″ and 1/2.7″ sensors, featuring F1.8 aperture, 60° HFOV, 0.2m MOD, and M9×0.35 mounting.
M905912506018 is 1/2.5″ or 1/2.7″ 5.9mm Industrial Lens, M9x0.35 mount, high resolution 5-Megapixel, F1.8, suitable for low-light conditions.
| IMAGE FORMAT | 1/2.5″, 1/2.7″ |
| FOCAL LENGTH | 5.9mm |
| F.O.V.@1/2.5″ | 75°(D=7.12) |
| 60°(H=5.70) | |
| 45°(V=4.28) | |
| F.O.V.@1/2.7″ | 70°(D=6.61) |
| 60°(H=5.76) | |
| 34°(V=3.24) | |
| RESOLUTION | 5MP |
| TV DISTORTION | <-7.8% |
| APERTURE | F1.8 |
| MOUNT | M9x0.35 |
| M.O.D. | 0.2m |
| T.T.L. | 16.77mm |
| STRUCTURE | Without IRCF |
This 5.9mm M9 wide angle industrial lens is designed for compact imaging systems that need broad scene coverage and a relatively large F1.8 aperture. Supporting 1/2.5″ and 1/2.7″ sensors with 5MP resolution, it provides up to 75° diagonal FOV for embedded machine vision, robotics, and compact industrial camera applications.
The actual field of view varies with sensor format, so the camera sensor should be evaluated together with focal length and working distance. The Sensor Guide can help when comparing compatible sensor formats.
This 5.9mm wide angle lens is designed for compact vision systems where a relatively broad viewing area is required without using an extreme fisheye configuration. With a 60° horizontal FOV on both specified sensor formats, it can capture a larger surrounding area while maintaining a practical focal length for embedded camera designs.
A key feature of this model is its F1.8 aperture. Compared with smaller-aperture industrial lenses, the larger aperture can provide greater light-gathering capability, making this configuration useful for vision systems operating under limited or variable illumination. It can be considered for indoor robotics, compact inspection equipment, mobile vision devices, and embedded AI cameras.
The lens is particularly suitable for applications where scene coverage and light collection are more important than ultra-low geometric distortion. Its specified TV distortion of less than -7.8% means it should not be positioned as a low distortion lens. Instead, the optical design is better suited to object detection, scene awareness, visual recognition, and general-purpose wide-area imaging where some geometric distortion can be managed through image processing.
The M9 × 0.35 interface also makes this lens appropriate for compact camera modules with restricted installation space. For systems where the required field of view needs to be calculated from target dimensions and working distance, the FOV Calculator can be used during the initial lens-selection process.
Designed for compact wide-angle vision, embedded AI imaging, and machine vision systems requiring broad coverage with an F1.8 aperture.
For optical applications where distortion is an important design parameter, engineers can review the Distortion Guide to understand how lens distortion affects image geometry and system performance.
Q: What sensor sizes are compatible with this 5.9mm lens?
A: The lens is specified for both 1/2.5″ and 1/2.7″ image formats, with 5MP resolution.
Q: What is the field of view on a 1/2.5″ sensor?
A: The specified FOV is 75° diagonal, 60° horizontal, and 45° vertical on a 1/2.5″ sensor.
Q: What is the field of view on a 1/2.7″ sensor?
A: On a 1/2.7″ sensor, the specified FOV is 70° diagonal, 60° horizontal, and 34° vertical.
Q: Is this a low distortion lens?
A: No. The specified TV distortion is less than -7.8%, so this model should not be classified as a low distortion lens. It is better suited to wide-area imaging and applications where moderate distortion can be corrected digitally if required.
Q: Is this lens a fisheye lens?
A: No. Its 75° diagonal FOV places it in the wide angle lens category, but the supplied specifications do not indicate a fisheye optical design.
Q: What is the advantage of the F1.8 aperture?
A: The F1.8 aperture provides relatively high light-gathering capability, which can be beneficial for compact vision systems operating under lower or variable lighting conditions.
Q: Does this lens include an infrared cut filter?
A: No. The supplied optical configuration is specified as Without IRCF.
Q: What is the minimum object distance?
A: The specified M.O.D. is 0.2m, or 200mm, allowing the lens to be used for relatively close-range imaging.
Q: Can this lens be integrated into an OEM camera?
A: Yes. The M9 × 0.35 mount is suitable for compact camera assemblies and embedded vision equipment. For customized optical or mechanical requirements, you can contact Towin to discuss the project.
Download Specs Sheet
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| H. F.O.V. | |
| RESOLUTION | |
| Max Dist. | |
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| FEATURE | |
| MOUNT | |
| T.T.L.(mm) | |
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