3mm Mini Fisheye M12 Lens
3mm S Mount Fisheye Lens Raspberry Pi
Miniature Fisheye Lens
3mm Mini Fisheye M12 Lens
3mm S Mount Fisheye Lens Raspberry Pi
Miniature Fisheye Lens

190° M12 Miniature Fisheye Lens for up to 1" such as IMX485 and IMX264

190°@9.1mm Fisheye M12 Lens

The CIL231 is a 3.1mm miniature fisheye lens which provides a 190° Field of View at 9.1mm Image Circle and 180° diagonal on 1/1.8" type sensors. The aperture of F/1.9 results in amazing low light performance with stunning 4K+ performance. The CIL231 is IP67 sealed.
$99.00
Selected Part Number is: CIL231-F1.9-M12ANIR
Request Volume Pricing

There are 0 units CIL231-F1.9-M12A650 (F/1.9 / M12A / With 650nm IRC Filter) at our US location. We try to restock quickly. Please contact us for availability.

There are 15 units CIL231-F1.9-M12ANIR (F/1.9 / M12A / Without Filter) in stock in the US.

Lens Features

>180° FoV

Suitable for up to 1" Type cameras with a large 9.0mm image circle.

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 NumberCIL231
Format Type1/1.8"
EFL3.1mm
F#1.9 Fixed
Resolution14MP+
Field of View118° @ 6.2mm image circle
Calculate for your sensor using our M12 Lens Calculator
Image Circle9.1mm
Distortion <10% F-Θ
See mechanical drawing for Optical, FΘ, and full TV distortion.
Weight12g
IR Cut-Off FilterP/N With: CIL231-F1.9-M12IR
P/N Without: CIL231-F1.9-M12NIR
ConstructionAll Glass, Aluminum
Mechanical Variants
Variant Description
"M12A" IP67, BBAR on Lens 1 Surface 1, Metal Cap+Barrel

Mechanical Drawing

A 3mm Miniature M12 Fisheye Lens for IMX485 and IMX264
Camera Mechanical Compatibility Table*
Camera/Mount Compatibility
Commonlands Compatible Mount CLA019-LCP
e-con Systems / Standard S-Mount 8mm - 13mm tall mount
Allied Vision Alvium S-Mount Yes
FLIR Blackfly S Board Yes
iDS uEye LE Rev1.1: Yes, Rev1.2: Must use PN ending "C-NO"
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.

Click here to Access Full Mechanical Drawings, Download the STP Files, etc..
M12 Lenses C Mount Lenses.webp__PID:d39df4c6-9351-4eae-9938-992a7c9a721e

Engineering & Quality Assured

Optical Engineering for M12 Lenses.webp__PID:cabadc1d-9038-478a-9ec1-b9515597d704

US Engineering Support

M12 Lens in the US.webp__PID:de4930ea-2073-44ee-ad75-d40d9d92487e

Easy Global Shipment

M12 Lens Manufacturing.webp__PID:7f1f5e48-3df5-4feb-9fa4-5a6210d8de49

Volume Production Ready

Here are a Few Similar Fisheye Lenses. Calculate the FoV (With Distortion!) using Our Lens Calculator. 

12
195°@9.2mm Fisheye M12 Lens
195°@9.2mm Fisheye M12 Lens
195°@9.2mm Fisheye M12 Lens
195°@9.2mm Fisheye M12 Lens
CIL232-F1.9-M12A650
195°@9.2mm Fisheye M12 Lens
$99.00
View Details
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Q: What is a Fisheye Lens?

A: A fisheye lens is a lens with maximum field of view greater than 180° and which contains distortion. If you use a fisheye lens on a smaller sensor, then the resulting image is a wide angle image with less than 180 degree field of view, and therefore some people consider "wide angle" lenses to also be fisheye.

Q: What is an M12 lens (S-mount lens)?

Answer: An M12 lens is a compact lens with a 12 mm thread diameter, often called an S-mount lens. These lenses screws into a camera’s M12 lens mount and are commonly used in board-level cameras for embedded vision systems. M12 lenses are smaller than C/CS-mount lenses, making them ideal for space-constrained applications like robotics​.

Q: What cameras can I use M12 lenses with?

A: There are many embedded vision cameras and AI cameras that are compatible with M12 leness. As long as camera's lens holder is compatible with the mechanical dimensions of the lens, the lens should focus! Please make sure to match the image circle, FoV, and resolution.

Q: How do you focus an M12 lens?

Answer: Use focus targets, then slowly thread the lens while displaying a video. Go past focus, then come back to focus. You can view our full article on how to focus camera lenses.