IR Corrected 8mm Lens for up to 4MP 1/2.5" Sensors such as OX05B1S

25mm C-Mount Lens 1.1" 25MP

The CIL544 is a fast 25mm 1.1" C-Mount lens for 20MP+ sensors. The manually adjustable iris from F/1.8 to F/∞ allows you optimize the depth of field of your system with the option to maximize low light.
$349.00

9pcs CIL544-F1.8-CMANIR (F/1.8 / Without Filter / C-Mount A) in stock in the US

In stock — orders before 12 PM PST ship same day

Lens Features

Adjustable Aperture

Adjustable F/1.8 to F/∞ aperture to optimize depth of field of your system.

Finite/Infinite Conjugate Optimized

Achieve crystal clear images from 130mm to infinity without field curvature.

High Resolution

Suitable for 2.74um pixel pitch for demanding applications.

Optical and Mechanical Specification Table

Lens Parameter Performance Detail
Part NumberCIL544
EFL25.0
F# 1.8
Resolution20MP+ (2.74μm)
Field of View39.1° @ 17.6mm — Calculate FoV for your sensor
Image Circle17.6mm
Distortion-1% from Rectilinear @ MoD
Weight88g
ConstructionAll Glass

Mechanical Layout

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

Frequently asked questions

What sensors does the CIL544 25mm C-mount lens support?

The CIL544 targets 1.1 inch sensors with 2.74μm pixel pitch at 20MP and above, including the GMAX0505, Lucid Vision TRI204S, and TRI245S.

Is the CIL544 aperture adjustable?

Yes. The CIL544 has a continuously adjustable iris from F/1.8 to fully closed. That gives you direct control over exposure and depth of field for your working distance and lighting.

What is the distortion on the CIL544 25mm C-mount lens?

The CIL544 measures -1% from rectilinear at minimum object distance. That level is low enough for dimensional measurement and metrology in many systems without software correction.

What is the working distance range for the CIL544?

The CIL544 focuses from 130mm to infinity. The design is optimized for both finite and infinite conjugate use, so close working distances stay sharp instead of rolling off at the edges.

Does the CIL544 25mm lens accept front filters?

Yes. The CIL544 has M30.5x0.5 front filter threads. That thread accepts common machine vision accessories such as ND filters, bandpass filters, and polarizers.

Does the CIL544 ship same day from the US?

Yes. Orders placed before 12 PM PST ship the same day from our San Diego warehouse. Contact engineering@commonlands.com if you need volume pricing on the CIL544.

The CIL544 is a 25mm C-mount lens for 20MP and above on 1.1" sensors with 2.74μm pixel pitch. It matches sensors like the GMAX0505, Lucid Vision TRI204S, and TRI245S. The iris adjusts continuously from F/1.8 wide open to fully closed, so you can tune exposure and depth of field around the actual station instead of around the catalog spec.

The CIL544 measures -1% from rectilinear at minimum object distance. That is low enough for metrology and dimensional inspection in many systems without the extra work of correction. The 39.1° field of view across the 17.6mm image circle puts the lens in the mid-telephoto range for factory automation and quality control. You can verify coverage at field of view calculator

The lens uses an all-glass construction and weighs 88g, so it stays balanced on standard C-mount machine vision cameras. The front takes M30.5x0.5 filters for ND, bandpass, or polarizing options. Focus runs from 130mm to infinity, and the design is optimized for both finite and infinite conjugate use. That flexibility is still unusual in this class.

One variant ships as CIL544-F1.8-CMANIR without a filter in C-Mount A configuration. The fast F/1.8 aperture matters on high-speed lines where shutter time gets tight and light is never as generous as the mechanical designer promised. You can estimate depth of field at depth of field calculator

All in-stock units ship the same day from San Diego when you order before 12 PM PST. Every lens is 100% MTF tested at our ISO 9001:2015 facility. Contact engineering@commonlands.com if you need volume pricing or application support on high-resolution C-mount systems.

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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.