192° Wide-Angle Fisheye M12 Lens for 5MP to 8MP Sensors
200°@5.5mm Fisheye M12 Lens
In stock — orders before 12 PM PST ship same day
Lens Features
200° FoV
Maximize your camera's viewing angle with a 5.5mm image circle
Short TTL
19.0mm TTL for a strong size-performance-cost balance
F-Θ Distortion
Less than 2% F-Θ distortion to 5.0mm image circle, -8% F-Θ at 5.5mm
Optical and Mechanical Specification Table
| Lens Parameter | Performance Detail |
|---|---|
| Part Number | CIL237 |
| EFL | 1.75 |
| F# | 2.2 |
| Resolution | 5MP, 2.2μm |
| Field of View | 192° — Calculate FoV for your sensor |
| Image Circle | 5.5mm |
| Distortion | Special Distortion: <2% F-Θ to 5.0mm IC, -8% F-Θ @ 5.5mm IC |
| Weight | 5g |
| IR Cut-Off Filter | 660nm |
| Construction | Glass+Plastic, Metal |
Mechanical Variants
| Variant | Description |
|---|---|
| M12A | BBAR on Lens 1 Surface 1, Metal Cap+Barrel |
Mechanical Layout
Camera Mechanical Compatibility Table*
| Camera/Mount | Compatibility |
|---|---|
| e-con Systems | CLA020 |
| Allied Vision | 7mm-10mm tall mount |
| FLIR | No |
| iDS | No |
| The Imaging Source | Rev1.1: Yes, Rev1.2: Must order PN ending C-NO |
| Basler | Contact The Imaging Source |
*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 is the CIL237 1.75mm fisheye M12 lens designed for?
The CIL237 is specified for formats from 1/3″ to 1/1.7″, and it is commonly used on sensors up to 5MP 1/2.5″ and 8MP 1/1.8″.
Why does the CIL237 page mention both 200° and 192° field of view?
Both numbers appear on the page. The product page markets the lens as 200° at 5.5mm, while the specification table lists 192° at 5.4mm image circle, so use the spec-table value for formal optical comparisons.
What is the distortion profile of the CIL237 fisheye M12 lens?
The CIL237 uses a special F-Θ distortion profile: less than 2% F-Θ through a 5.0mm image circle and -8% F-Θ at the full 5.5mm image circle.
Which lens holder should I use with the CIL237 M12 fisheye?
The CLA020 holder is one compatible mounting option for the CIL237.
Is the CIL237 compatible with Allied Vision or FLIR board cameras?
No. The page lists Allied Vision Alvium and FLIR Blackfly S Board as mechanically incompatible with the CIL237.
Are STP files available for the CIL237 200° fisheye lens?
Yes. Mechanical drawings and STP files for the CIL237 are available on request from the engineering team.
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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.