20mm M12 Lens For Up To 1/1.7" Sensors such as IMX226 and AR0821

Telephoto 21.8mm M12 Lens

The CIL121 is a 21.8mm M12 lens for up to 12MP+ 1/1.8" sensors. This lens is originally optimized for finite conjugate imaging, making it good for machine vision applications.

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There are 124 units CIL121-F2.8-M12A650 (F/2.8 / M12A / With 650nm IRC Filter) in stock in the US.

There are 50 units CIL121-F2.8-M12ANIR (F/2.8 / M12A / Without Filter) in stock in the US.

There are 50 units CIL121-F5.9-M12ANIR (F/5.9 / M12A / Without Filter) in stock in the US.

There are 13 units CIL121-F8.0-M12A650 (F/8.0 / M12A / With 650nm IRC Filter) in stock in the US.

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.STP / Drawing Engineering Support

Lens Features

Telephoto Field of View

A long 21.8mm EFL is suitable for machine vision and telephoto applications.

Finite Conjugate Optimized

Optimized for 500mm working distance ensures good performance from infinity down to 50mm.

Large Format

Suitable for large format sensors up to 1/1.7" such as IMX226 and AR0821

Optical and Mechanical Specification Table

Lens Parameter	Performance Detail
Part Number	CIL121
Format Type	1/1.7"
EFL	21.8mm
F#	2.8 Fixed
Resolution	12MP
Field of View	18° @ 7.0mm Calculate for your sensor using our M12 Lens Calculator
Image Circle	9.4mm
Distortion	~1%
Weight	6.8g
IR Cut-Off Filter	P/N With: CIL121-F2.8-M12A650 P/N Without: CIL121-F2.8-M12ANIR
Construction	All-Glass

Mechanical Variants

Variant	Description
"M12A"	No Ingress Protection, BBAR on Lens 1 Surface 1, AL6061 Cap+Barrel

Mechanical Layout

Camera Mechanical Compatibility Table*

Camera/Mount	Compatibility
Commonlands Compatible Mount	CLA019
e-con Systems / Standard S-Mount	10mm-15mm 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.

Click here to download .STP files and Mechanical Drawings