Low Distortion 5.2mm M12 Lens for up to 1/1.8" Sensors such as AR2020
195°@9.2mm Fisheye M12 Lens
The CIL232 is an athermalized all-glass all-metal M12 fisheye lens with 200° FoV @ 9.3mm image circle which provides full coverage on sensors like the AR0821.
In stock — orders before 12 PM PST ship same day
Lens Features
Low F/#
All-glass all-metal design, with F/1.9 for incredible low light performance.
IP67
IP67 rated for dust and water resistance.
Optical and Mechanical Specification Table
| Lens Parameter | Performance Detail |
|---|---|
| Part Number | CIL232 |
| EFL | 3.1 |
| F# | 1.9 |
| Field of View | 181° @ 8.8mm image circle — Calculate FoV for your sensor |
| Image Circle | 8.8mm |
| Distortion | '<10% F-Θ |
| Weight | 12g |
| IR Cut-Off Filter | P/N With: CIL232-F1.9-M12A650 P/N Without: CIL231-F1.9-M12ANIR |
| Construction | All Glass, Aluminum |
Mechanical Variants
| Variant | Description |
|---|---|
| M12A | IP67, BBAR on Lens 1 Surface 1, Metal Cap+Barrel |
Mechanical Layout
Camera Mechanical Compatibility Table*
| Camera/Mount | Compatibility |
|---|---|
| Commonlands CLA019-LCP | CLA019-LCP |
| e-con Systems S-Mount | 8mm - 13mm tall mount |
| Allied Vision Alvium S-Mount | Yes |
| FLIR Blackfly S Board | Yes |
| iDS uEye XLS | Yes |
| The Imaging Source M12 | Yes |
| Basler Dart S-Mount | Yes |
*Mechanical compatibility only, assuming the standard M12x0.5 lens mount provided by the camera manufacturer. Please check optical compatibility separately.
Frequently asked questions
What sensors does the CIL232 mini fisheye support?
The CIL232 fits sensors up to 1/1.7″ format including the IMX728 and AR0823. It resolves 12MP+ at 1.85µm pixel pitch across the 8.8mm image circle.
How wide is the CIL232 field of view?
The total field of view is 200°, and 181° is measured at the 8.8mm image circle. That is wide enough for surround-view, overhead monitoring, and multi-camera stitching.
Is the CIL232 weatherproof for outdoor use?
Yes, the M12A variant is IP67-rated with a sealed metal barrel and a BBAR-coated front element. Both the CIL232-F1.9-M12A650 and CIL232-F1.9-M12ANIR are sealed.
What lens holder works with the CIL232?
The Commonlands CLA019-LCP lens holder is the recommended mount. e-con Systems boards need an 8–13mm tall holder, and Allied Vision Alvium, FLIR Blackfly S, iDS uEye XLS, The Imaging Source, and Basler Dart are also mechanically compatible.
Does the CIL232 fisheye lens ship same day from the US?
Yes, Commonlands ships in-stock M12 lenses same day from San Diego, California for orders placed before 12 PM PST.
What is the distortion profile of the CIL232?
Distortion is under 10% F-Theta. The CIL232 uses F-Theta projection rather than rectilinear projection, which is standard for fisheye lenses at this field angle.
Similar Fisheye
About Commonlands
Commonlands LLC designs and manufactures precision M12, C-mount, and M8 lenses for machine vision, robotics, and embedded camera systems. Based in San Diego, California, we stock inventory for same-day shipping and provide direct access to US-based optical engineers. Whether you need a single prototype lens or production volumes of 25,000+, our team supports the full lifecycle from optical design consultation through volume fulfillment.
Need help selecting the right lens for your camera module?
Contact our US-based Optical Engineers.