12mm High Resolution C-Mount lens \| 25MP sensors w/2.5um pixels such as GMAX0505, TRI204S, TRI245S

12mm C-Mount Lens 1.1" 25MP

The CIL542 is an IR Corrected 12mm C-Mount Lens for up to 25MP 1.1" sensors with pixel size as small as 2.5um such as the GMAX0505. The F/2.8 closes to F/16 and the lens has a M46x0.75 thread for filters.

$349.00

2pcs CIL542-F2.8-CMANIR (F/2.8 / 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/2.8-F/16 aperture to optimized depth of field of your system.

Finite/Infinite Conjugate Optimized

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

Optical and Mechanical Specification Table

Lens Parameter Performance Detail
Part NumberCIL542
EFL12.0
F# 2.8
Resolution25MP (2.5um)
Field of View72° @ 17.6mm — Calculate FoV for your sensor
Image Circle17.6mm
Distortion-0.6% from Rectilinear @ MoD
Weight255g
ConstructionAll Glass
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 CIL542 12mm C-mount lens support?

The CIL542 covers 1.1 inch sensors with pixel pitch down to 2.5µm at 25MP. It works with the GMAX0505, TRI204S, and TRI245S, and the 17.6mm image circle fills the full 1.1 inch format.

How much distortion does the CIL542 have?

Distortion is -0.6% from rectilinear at minimum object distance. That level is low enough for dimensional measurement, gauging, and machine vision inspection without software correction in many systems.

Can I adjust the aperture on the CIL542?

Yes, the aperture adjusts from F/2.8 to F/16, so you can trade light for depth of field at your working distance. You can use depth of field calculator to plan the setup.

What is the minimum working distance for the CIL542?

The minimum working distance is 130mm. The optical design stays optimized from 130mm to infinity, so you do not give up corner performance when you focus closer.

Does the CIL542 12mm C-mount lens include an IR filter?

The CIL542-F2.8-CMANIR ships without an IR filter. The M46x0.75 filter thread accepts standard machine vision filters for visible, NIR, or bandpass use.

Does the CIL542 ship same day from the US?

Yes, orders placed before 12 PM PST ship same day from our San Diego warehouse. You can contact us for stock availability and volume pricing on the CIL542.

CIL542 is a 12mm C-mount lens for 1.1" sensors running 25MP at 2.5µm pixel pitch. It covers the GMAX0505, TRI204S, and TRI245S with a 17.6mm image circle and 72° field of view. The aperture adjusts from F/2.8 to F/16, so you can trade light for depth of field when a line runs around 100mm working distance.

Distortion is -0.6% from rectilinear at minimum object distance, which is low enough for dimensional measurement and gauging without software correction in many setups. The all-glass optical design stays more stable through temperature swings than hybrid alternatives. The IR-corrected optics also stay sharp in visible and near-IR without a refocus step. You can check coverage at field of view calculator

The lens weighs 255g and uses an M46x0.75 filter thread. That size tells you this is a full industrial C-mount lens, not a compact board-camera optic. The finite/infinite conjugate optimization keeps the field flat from 130mm working distance out to infinity instead of letting field curvature soften the corners.

Commonlands ships one variant: CIL542-F2.8-CMANIR without filter. The M46x0.75 thread accepts standard machine vision filters for bandpass or polarization. The lens works with 1.1" format area scan cameras from Lucid, FLIR, Basler, or Ximea.

Orders placed before 12 PM PST ship same day from San Diego. You can contact our optical engineers at engineering@commonlands.com for volume pricing or to discuss your sensor and working distance requirements.

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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.