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.
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 Number | CIL542 |
| EFL | 12.0 |
| F# | 2.8 |
| Resolution | 25MP (2.5um) |
| Field of View | 72° @ 17.6mm — Calculate FoV for your sensor |
| Image Circle | 17.6mm |
| Distortion | -0.6% from Rectilinear @ MoD |
| Weight | 255g |
| Construction | All Glass |
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.
Similar C‑Mount Lenses: 4mm – 75 mm Industrial Optics
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.