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

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)?

An M12 lens is a compact lens with a 12 mm thread diameter, often called an S-mount lens. These lenses screw 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?

There are many embedded vision cameras and AI cameras that are compatible with M12 lenses. As long as the camera's lens holder is compatible with the mechanical dimensions of the lens, the lens should focus! Please ensure you match the image circle, field of view (FoV), and resolution. We recommend checking out options from companies such as e-con Systems Cameras , iDS Cameras , The Imaging Source Cameras , D3 Engineering , and Hellbender Cameras .

Q: How do you focus an M12 lens?

Use focus targets, then slowly thread the lens while displaying a video. Go past focus, then come back to focus. For more detailed guidance, please refer to our full article on how to focus camera lenses .

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-M12A650

Request Volume Pricing

There are 84 units CIL231-F1.9-M12A650 (F/1.9 / M12A / With 650nm IRC Filter) in stock in the US.

There are 65 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 Number	CIL231
Format Type	1/1.8"
EFL	3.1mm
F#	1.9 Fixed
Resolution	14MP+
Field of View	118° @ 6.2mm image circle Calculate for your sensor using our M12 Lens Calculator
Image Circle	9.1mm
Distortion	<10% F-Θ See mechanical drawing for Optical, FΘ, and full TV distortion.
Weight	12g
IR Cut-Off Filter	P/N With: CIL231-F1.9-M12IR P/N Without: CIL231-F1.9-M12NIR
Construction	All 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

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Volume Production Ready

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

1 2

1 2 3

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.

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

190°@9.1mm Fisheye M12 Lens

Lens Features

>180° FoV

Low F/#

IP67

Mechanical Drawing

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