A 2.1mm M12 Lens for 1/3
Tiny Pinhole Lens for S-Mount Cameras
15mm TTL Short M12 Lens for Surveillance
A 2.1mm M12 Lens for 1/3
Tiny Pinhole Lens for S-Mount Cameras
15mm TTL Short M12 Lens for Surveillance

Stereographic Wide-Angle 2.1mm M12 Lens for up to 1/2.7" sensors such as IMX219 and IMX214

Small 2.1mm M12 Lens

The CIL821 is a 12MP+ 2.1mm miniature S-Mount lens which provides a 125° Horizontal Field of View on 1/2.8" sensors. It's compact form factor and high resolution make it ideal for OEM applications such as doorbell cameras.
$39.00
Selected Part Number is: CIL821-F2.4-M12B650
Request Volume Pricing

There are 0 units CIL821-F2.4-M12ANIR (F/2.4 / M12A / Without Filter) at our US location. We try to restock quickly. Please contact us for availability.

There are 38 units CIL821-F2.4-M12B650 (F/2.4 / M12B / With 650nm IRC Filter) in stock in the US.

There are 44 units CIL821-F2.4-M12BNIR (F/2.4 / M12B / Without Filter) in stock in the US.

Lens Features

Wide-Angle FoV

>145° FoV w/ stereographic distortion comparable to sports action camera lenses.

 4K Resolution

Optical resolution suitable for 12MP+ sensors up to 1/2.7" in format.

Compact Size

A short TTL of 15mm is ideal for weight and size-constrained applications.

Optical and Mechanical Specification Table
Lens Parameter Performance Detail
Part NumberCIL821
Format Type1/2.7"
EFL2.1mm
F#2.4 Fixed
Resolution12MP+
Field of View126° @ 5.4mm image circle
Calculate for your sensor using our M12 Lens Calculator
Image Circle6.7mm
Distortion <20% TV
Weight4.0g
IR Cut-Off FilterP/N With: CIL821-F2.4-M12B650
P/N Without: CIL821-F2.4-M12BNIR
ConstructionHybrid Glass/Plastic with Aluminum Barrel

Mechanical Layout

The Mechanical Diagram for a Wide Angle F/2.4 Lens
Camera Mechanical Compatibility Table*
Camera/Mount Compatibility
Commonlands Compatible Mount CLA022
e-con Systems S-Mount With CLA021
Allied Vision Alvium S-Mount No
FLIR Blackfly S Board No
iDS uEye LE No
The Imaging Source M12 No
Basler Dart S-Mount No

*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

Search all 50+ Wide Angle and Low distortion lenses and calculate the FoV with Distortion. 

Small 1.9mm M12 Lens

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Small 1.9mm M12 Lens

Small 2.1mm M12 Lens

CIL821-F2.4-M12B650

Small 2.1mm M12 Lens

Small 2.5mm M12 Lens

CIL825-F2.4-M12ANIR

Small 2.5mm M12 Lens

Wide-Angle 2.7mm M12 Lens

CIL327-F1.5-M12A660

Wide-Angle 2.7mm M12 Lens

GoPro 3.0mm M12 Lens

CIL331-F2.5-M12A660

GoPro 3.0mm M12 Lens

Wide-Angle 3.5mm M12 Lens

CIL335-F1.8-M12A660

Wide-Angle 3.5mm M12 Lens

F-theta Wide-Angle 4mm M12 Lens

CIL340-F2.0-M12A650

F-theta Wide-Angle 4mm M12 Lens

Wide-Angle 4.4mm M12 Lens

CIL344-F1.9-M12B660

Wide-Angle 4.4mm M12 Lens
2mm M12 Lens stereographic
2mm M12 Lens stereographic
2mm M12 Lenses stereographic
2mm M12 lens F2
CIL819-F2.0-M12A650
Small 1.9mm M12 Lens
$39.00
A 2.1mm M12 Lens for 1/3
A 2.1mm M12 Lens for 1/3
Tiny Pinhole Lens for S-Mount Cameras
15mm TTL Short M12 Lens for Surveillance
CIL821-F2.4-M12B650
Small 2.1mm M12 Lens
$39.00
Stereographic M12 Lens
Stereographic M12 Lens
Stereographic M12 Lens
Stereographic M12 Lens
CIL825-F2.4-M12ANIR
Small 2.5mm M12 Lens
$39.00
3mm Wide Angle M12 Lens IMX415
3mm Wide Angle M12 Lens IMX415
Sony IMX415 Lens
M12 S Mount Lens for IMX415
CIL327-F1.5-M12A660
Wide-Angle 2.7mm M12 Lens
$39.00
3.1mm Wide Angle M12 Lens
3.1mm Wide Angle M12 Lens
3mm S-Mount Lens
3mm M12 Lens
CIL331-F2.5-M12A660
GoPro 3.0mm M12 Lens
$39.00
3.5mm Wide-Angle M12 Lens
3.5mm Wide-Angle M12 Lens
3.5mm Wide-Angle S-Mount Lens
Wide-Angle M12 Lens CIL335
CIL335-F1.8-M12A660
Wide-Angle 3.5mm M12 Lens
$49.00