A 2.5mm CS-Mount Fisheye Lens for CCTV Cameras and Raspberry Pi HQ
Fisheye 2.5mm CS Mount Lens
In stock — orders before 12 PM PST ship same day
Lens Features
4K+ Resolution
Achieve SFR (system MTF) which matches the Pi HQ sensor, the Sony IMX477.
Drop-In Compatible
This lens can be quickly swapped in and out for other lenses.
Optical and Mechanical Specification Table
| Lens Parameter | Performance Detail |
|---|---|
| Part Number | CIL725 |
| EFL | 2.54 |
| F# | 1.8, 14.0 |
| Resolution | 12MP |
| Field of View | 190° @ 6.4mm image circle — Calculate FoV for your sensor |
| Image Circle | 6.4mm |
| Distortion | -9% F-Θ |
| Weight | 81g |
| Construction | All-glass all-metal |
Mechanical Layout
Camera Mechanical Compatibility Table*
| Camera/Mount | Compatibility |
|---|---|
| Commonlands CLA024 | CLA024 |
| e-con Systems S-Mount | 10mm - 13mm tall holder |
| Allied Vision Alvium S-Mount | Yes |
| FLIR Blackfly S Board | Yes |
| iDS uEye LE | Rev1.1: Yes, Rev1.2: 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 work with the CIL725 CS-mount fisheye lens?
The CIL725 covers sensors up to 2/3 inch format at 12MP resolution. On 1/2.3 inch sensors like the IMX477, it gives 190° horizontal field of view. Stop it down to F/2.4 if you need 14MP+ on a high-density sensor.
What is the field of view of the CIL725?
The CIL725 gives 190° field of view on a 6.4mm image circle. On 2/3 inch sensors you get a full circular fisheye image, while 1/2.3 inch sensors get 190° horizontal coverage.
Can the CIL725 be used with Raspberry Pi HQ Camera?
Yes, the CIL725 can be used with the Raspberry Pi HQ Camera because it threads on through CS-mount. On the IMX477, it gives 190° horizontal coverage.
What is the aperture range of the CIL725?
The CIL725 has a manual iris that runs from F/1.8 to F/14. F/1.8 gives maximum light, and stopping down to F/2.4 raises resolving power to 14MP+.
Does the CIL725 CS-mount fisheye ship from the US?
Yes, in-stock CIL725 lenses ship same day from San Diego, California for orders placed before 12 PM PST.
What cameras are mechanically compatible with the CIL725?
The CIL725 is mechanically compatible with FLIR Blackfly S, Allied Vision Alvium, iDS uEye LE, The Imaging Source M12 boards, Basler Dart, and Raspberry Pi HQ Camera. Use the Commonlands CLA024 adapter if your camera board is based on M12 mounting.
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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.