F-theta M12 Lens for | 180°@7.5mm and 5MP up to 2/3" such as ISX031

Wide Angle 2.5mm M12 Lens

The CIL926 is an Fθ M12 lens for up to 5MP 1/2.5" sensors. The distortion and >170° FoV allows for consistent angular resolution in your output image. The lens is all-glass and ingress protected, making it suitable for exterior applications.
$39.00

CIL926-F2.4-M12A650 (F/2.4 / M12A / With 650nm IRC Filter) — we try to restock quickly, contact for availability

25pcs CIL926-F2.4-M12ANIR (F/2.4 / M12A / Without Filter) in stock in the US

In stock — orders before 12 PM PST ship same day

Lens Features

All Glass All Metal

Thermal Stability resulting from All-Glass All-metal lens construction.

IP67 Rating

Expose the lens directly to the elements for exterior applications.

F-Theta Distortion

Consistent angular resolution across the field of view.

Optical and Mechanical Specification Table

Lens Parameter Performance Detail
Part NumberCIL926
EFL2.5
F# 2.4
Resolution5MP, 2μm
Field of View172° @ 7.4mm image circle — Calculate FoV for your sensor
Image Circle7.4mm
Distortion-1.4% F-Θ @
Weight12g
IR Cut-Off FilterNIR
ConstructionAll Glass, Aluminum

Mechanical Variants

Variant Description
M12A IP67, BBAR on Lens 1 Surface 1, Metal Cap+Barrel

Mechanical Layout

Camera Mechanical Compatibility Table*

*Mechanical compatibility only, assuming the standard M12x0.5 lens mount provided by the camera manufacturer. Please check optical compatibility separately.

Same Day Ship by 12 PM PST
US-Based Optical Engineering Support
25,000+ Stock in California
100% MTF Tested

Frequently asked questions

What sensor size does CIL926 cover?

CIL926 is specified for sensors up to 1/2.5″ and uses a 7.4mm image circle. That gives it room for very wide coverage on small-format sensors.

What is the distortion profile of CIL926?

The lens uses an F-Theta distortion profile and is listed at about -1.4% F-θ. That is low for a 172° field of view and helps keep angular mapping more uniform across the frame.

What resolution is CIL926 designed to support?

CIL926 is rated for 5MP imaging with 2μm pixels. That is the sensor class it was built to support.

Is CIL926 built for outdoor or exposed use?

Yes. The listed mechanical version is IP67, so the lens is meant for applications that need dust and water resistance.

Why does the all-glass, aluminum construction matter?

All-glass optics and an aluminum housing usually hold focus and alignment more consistently across temperature changes than lighter mixed-material designs. That matters when the camera lives outdoors or near heat.

How heavy is CIL926?

The listed weight is 12g. That is heavier than a minimal plastic hybrid, but the mechanical stability is usually worth it.

CIL926 is an ultra-wide M12 lens with a 2.5mm effective focal length, F/2.4 aperture, and 172° field of view. It is specified for sensors up to 1/2.5", uses a 7.4mm image circle, supports 5MP with 2μm pixels, and weighs 12g. That is a lot of coverage without stepping into a circular fisheye format.

The main optical feature is the F-Theta distortion profile. Commonlands lists the distortion at about -1.4% F-θ, which is low for this field angle and keeps angular mapping more uniform across the image. That matters when you care about wide scene measurement or stable geometry from center to edge instead of just getting a dramatic picture.

The mechanics use an all-glass, aluminum construction rather than a mixed-material stack. That usually holds focus better across temperature changes and makes the lens easier to trust in outdoor hardware. The listed version is IP67, so it fits exposed cameras much better than a non-sealed indoor lens.

If you need more than 170° of coverage without moving to a circular fisheye, the CIL926 is one of the cleaner options in this size class. The 2.5mm EFL, 7.4mm image circle, and low F-Theta distortion point it at wide embedded vision systems that still need usable geometry.

Similar M12 Lenses (S-Mount Lenses) for Embedded Machine Vision

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CIL350-F2.4-M12A650

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CIL227-F2.5-M12B660

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CIL281-F1.8-M12A650

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About Commonlands

Commonlands LLC designs and manufactures precision M12, C-mount, and M8 lenses for machine vision, robotics, and embedded camera systems. Based in San Diego, California, we stock inventory for same-day shipping and provide direct access to US-based optical engineers. Whether you need a single prototype lens or production volumes of 25,000+, our team supports the full lifecycle from optical design consultation through volume fulfillment.

Need help selecting the right lens for your camera module?

Contact our US-based Optical Engineers.