20mm M12 lenses for finite conjugate
20mm M12 Lenses short working distance
22mm S Mount Lenses
20mm M12 lenses for finite conjugate
20mm M12 Lenses short working distance
22mm S Mount Lenses

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.
$59.00
Selected Part Number is: CIL121-F2.8-M12A650
Request Volume Pricing

There are 64 units CIL121-F2.8-M12A650 (F/2.8 / M12A / With 650nm IRC Filter) in stock in the US.

There are 37 units CIL121-F2.8-M12ANIR (F/2.8 / M12A / Without Filter) in stock in the US.

There are 71 units CIL121-F5.9-M12ANIR (F/5.9 / M12A / Without Filter) in stock in the US.

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 NumberCIL121
Format Type1/1.7"
EFL21.8mm
F#2.8 Fixed
Resolution12MP
Field of View18° @ 7.0mm
Calculate for your sensor using our M12 Lens Calculator
Image Circle9.4mm
Distortion ~1%
Weight6.8g
IR Cut-Off FilterP/N With: CIL121-F2.8-M12A650
P/N Without: CIL121-F2.8-M12ANIR
ConstructionAll-Glass
Mechanical Variants
Variant Description
"M12A" No Ingress Protection, BBAR on Lens 1 Surface 1, AL6061 Cap+Barrel

Mechanical Layout

A 20mm M12 Lens for Telephoto applications
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.

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Engineering & Quality Assured

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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

Our 12mm, 16mm, 25mm, 35mm, 50mm M12 Lenses. Search all 50+ M12 Lenses including Wide-Angle.

IR Corrected 12mm M12 Lens

CIL122-F2.0-M12A650

IR Corrected 12mm M12 Lens

Telephoto 14.2mm M12 Lens

CIL142-F2.6-M12A650

Telephoto 14.2mm M12 Lens

Telephoto 16mm M12 Lens

CIL160-F1.9-M12A650

Telephoto 16mm M12 Lens

Telephoto 21.8mm M12 Lens

CIL121-F2.8-M12A650

Telephoto 21.8mm M12 Lens

IR Corrected 25mm M12 Lens

CIL250-F2.0-M12A650

IR Corrected 25mm M12 Lens

Telephoto 35mm M12 Lens

CIL350-F2.4-M12A650

Telephoto 35mm M12 Lens

Telephoto 50mm M12 Lens

CIL051-F2.8-M12ANIR

Telephoto 50mm M12 Lens
IR Corrected 12mm M12 Lens
IR Corrected 12mm M12 Lens
12mm S-Mount Lens
IR Corrected M12 Lens
CIL122-F2.0-M12A650
IR Corrected 12mm M12 Lens
$59.00
14mm M12 Lens CIL142
14mm M12 Lens CIL142
14mm S Mount Lenses
14mm M12 Lens
CIL142-F2.6-M12A650
Telephoto 14.2mm M12 Lens
$59.00
16mm M12 Lens CIL160 global shutter
16mm M12 Lens CIL160 global shutter
16mm M12 lenses CIL160 global shutter
16mm S Mount Lens global shutter
CIL160-F1.9-M12A650
Telephoto 16mm M12 Lens
$39.00
20mm M12 lenses for finite conjugate
20mm M12 lenses for finite conjugate
20mm M12 Lenses short working distance
22mm S Mount Lenses
CIL121-F2.8-M12A650
Telephoto 21.8mm M12 Lens
$59.00
25mm M12 Lens 25mm S Mount Lens
25mm M12 Lens 25mm S Mount Lens
25mm S Mount Lens
Mini 25mm M12 Lens
CIL250-F2.0-M12A650
IR Corrected 25mm M12 Lens
$79.00
35mm M12 Lens
35mm M12 Lens
35mm Board Mount Lens
35mm S Mount Lens
CIL350-F2.4-M12A650
Telephoto 35mm M12 Lens
$59.00