All Glass 4mm M12 Lens with Low Distortion and Wide Angle

The CIL037 is a 3.8mm all-glass M12 lens for 2/3" class coverage and 6MP sensors at 2.2μm pixel pitch. It gives a 100° field of view across an 8.0mm image circle at F/2.8, which puts it in the wide-angle range without going to a fisheye projection.

The lens uses all-glass optics in a metal barrel and weighs 8g. That construction is a good fit when you want a wide M12 lens that holds focus and geometry better than plastic-element optics. The page does not list a numeric distortion value, so measurement applications should verify distortion against the drawing or an optical test report instead of assuming it is negligible.

The listed part numbers are CIL037-F2.8-M12ABG650 with a blueglass absorptive 650nm IRC filter and CIL037-F2.8-M12ANIR without a filter. The M12A mechanical variant has no ingress protection and uses BBAR coating on lens 1 surface 1 with an AL6061 cap and barrel.

The Commonlands CLA024 holder is one compatible mount. The page lists e-con Systems S-Mount with the included AL6061 lens holder, iDS uEye LE, The Imaging Source M12, and Basler Dart S-Mount as compatible, while Allied Vision Alvium and FLIR Blackfly S Board are listed as not mechanically compatible. In-stock orders placed before 12 PM PST ship same day from San Diego.