3.1mm Wide Angle M12 Lens
3mm S-Mount Lens
3mm M12 Lens
3.1mm Wide Angle M12 Lens
3mm S-Mount Lens
3mm M12 Lens

Wide-Angle 3mm M12 Lens for up to 1/2" such as IMX477 and IMX577.

GoPro 3.0mm M12 Lens

The CIL331 is a wide-angle 3mm M12 lens which provides 122° Horizontal Field of View on 1/2.3" sensors. This 12MP-16MP lens provides an image comparable to a GoPro camera.
Selected Part Number is: CIL331-F2.5-M12A660
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There are 12 units CIL331-F2.5-M12A660 (F/2.5 / M12A / With 660nm IRC Filter) in stock in the US.

There are 6 units CIL331-F2.5-M12ANIR (F/2.5 / M12A / Without Filter) in stock in the US.

Lens Features

>150° FoV

Field of view matching a GoPro camera when used with an IMX477 sensor.


MTF suitable for 12MP 1/2.5" and 10MP-12MP 1/2.3" image sensors. 

Optical and Mechanical Specification Table
Lens Parameter Performance Detail
Part NumberCIL331
Format Type1/2"
F#2.5 Fixed
Field of View122° @ 6.3mm image circle
Calculate for your sensor using our M12 Lens Calculator
Image Circle8.1mm
Distortion -3% F-Θ
IR Cut-Off FilterP/N With: CIL331-F2.5-M12A660
P/N Without: CIL331-F2.5-M12ANIR
ConstructionAll Glass, Aluminum
Mechanical Variants
Variant Description
"M12A" No Ingress Protection, BBAR on Lens 1 Surface 1, AL6061 Cap+Barrel

Mechanical Layout

IMX477 GoPro Fisheye Replacement for IMX477 M12 Lens
Camera Mechanical Compatibility Table*
Camera/Mount Compatibility
Commonlands Compatible Mount CLA024
e-con Systems Standard S-Mount 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.

M12 Lenses Inspected in the USA.

Inspected in the US

Camera Design Customer Support Based in the USA.

US Engineering Support

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Customizations Available

M12 Lens provider

Global Shipment

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