72.5mm C-Mount lens for up to 1.2" sensors such as IMX530

75mm C-Mount Lens 1.2" 25MP

The CIL557 is a 72.5mm C-Mount lens for up to 25MP 1.2" sensors with 2.74um pixel pitch. IMPORTANT NOTE: This Lens has working distance range of 500mm-1600mm ONLY; you can use it at closer distances using a C-mount spacer but cannot use it at infinity.

$249.00

3pcs CIL557-F3.0-CMANIR (Default Title) in stock in the US

In stock — orders before 12 PM PST ship same day

Lens Features

Adjustable Aperture

Adjustable F3.0-F/15+ aperture to optimized depth of field of your system.

Large Format Size

Suitable for up to 1.2″ or larger (4/3″) sensors.

Optical and Mechanical Specification Table

Lens Parameter Performance Detail
Part NumberCIL557
EFL72.5
F# 3.0
Field of View15.2° @ 19.3mm image circle — Calculate FoV for your sensor
Image Circle19.3mm
Distortion-0.02% TV
Weight138g
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 work with the CIL557 75mm C-mount lens?

The CIL557 fits 1.2″ format sensors with 2.74µm pixel pitch at 25MP. The Sony IMX530 is a direct match, and the 19.3mm image circle also covers smaller formats like 2/3″ and 1.1″ with a narrower field of view.

Why does the CIL557 only focus from 500mm to 1600mm?

The CIL557 is optimized as a finite conjugate lens for 500mm to 1600mm working distance. That is a deliberate optical choice for inspection and metrology, and C-mount spacer rings can shift the range closer. The lens cannot focus at infinity.

How much distortion does the CIL557 75mm lens have?

TV distortion is -0.02%. That is essentially zero, so the lens is suitable for dimensional gauging and measurement where geometric accuracy matters.

Can I use the CIL557 on a CS-mount camera?

Yes, any C-mount lens works on a CS-mount camera with a 5mm spacer adapter to account for the flange distance difference. Optical performance does not change.

Does the CIL557 ship same day from the US?

Yes, Commonlands ships in-stock lenses same day from San Diego, California for orders placed before 12 PM PST.

Can I add a filter to the CIL557?

Yes, the CIL557 accepts M30.5x0.5 threaded filters, so you can add IR cut filters, bandpass filters, or polarizers directly to the lens barrel.

CIL557 is a 72.5mm C-mount lens for 25MP sensors up to 1.2" format with 2.74µm pixel pitch, including the Sony IMX530. The aperture adjusts from F/3.0 to F/15+, so you can dial in depth of field for the working distance and part geometry.

The constraint on this lens is focus range. It works from 500mm to 1600mm only and will not focus at infinity. You can shift the close-focus range with C-mount spacers, but the lens is still a finite conjugate design. Within its intended range, distortion is -0.02% TV and the 19.3mm image circle covers the full 1.2" sensor diagonal. The lens also works on 2/3" and 1.1" cameras with a cropped field of view.

The lens uses all-glass construction, weighs 138g, and includes M30.5x0.5 filter threading for IR blocking or bandpass filters. The field of view is 15.2°, which is narrow enough for detailed part inspection, label reading, and metrology at 0.5 to 1.6 meter standoff distances.

The lens uses the standard C-mount 1"-32 TPI thread. It is compatible with Basler, FLIR, Allied Vision, IDS, and The Imaging Source cameras. It also mounts on CS-mount cameras with a 5mm adapter ring. You can use field of view calculator to model coverage on your sensor size.

The lens ships same day from San Diego for orders before 12 PM PST. You can reach our US-based optical engineers for volume pricing or guidance on working distance optimization. You can use depth of field calculator as a starting point for depth of field estimation.

Similar C‑Mount Lenses: 4mm – 75 mm Industrial Optics

CIL508-F2.4-CMANIR

8mm C-Mount Lens 1.1" 12MP

$249.00

CIL512-F2.8-CMANIR

12mm C-Mount Lens 1.1" 12MP

$249.00

CIL513-F2.8-CMANIR

16mm C-Mount Lens 1.1" 12MP

$249.00

CIL514-F2.8-CMANIR

25mm C-Mount Lens 1.1" 12MP

$249.00

CIL515-F2.8-CMANIR

35mm C-Mount Lens 1.1" 12MP

$0.00

CIL516-F2.8-CMANIR

50mm C-Mount Lens 1.1" 12MP

$249.00

CIL532-F2.0-CMANIR

12mm C-Mount Lens 2/3" 12MP

$149.00

CIL536-F2.8-CMANIR

50mm C-Mount Lens 2/3" 12MP

$149.00

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.