Wide-Angle No-Distortion M12 Lens for up to 1/2.3" sensors such as AR0521

The CIL039 is a 3.9mm M12 lens at F/2.8 that covers 1/1.8" to 1/2.3" sensors while resolving 8MP and above. It gives 77° horizontal field of view on a 6.2mm image circle, which is wide enough for barcode readers, conferencing cameras, and general machine vision without the heavy barrel distortion that usually comes with shorter M12 lenses.

Distortion stays below 0.2% TV. That number matters because most systems can skip software dewarping, which saves processing time and avoids extra latency in measurement or decoding pipelines. The 7.8mm designed image circle (8.9mm maximum) also gives you margin on 1/2" sensors like the AR0521.

Hybrid glass and plastic optics keep the lens at 5.6g, so it works well in volume builds where cost and weight both matter. The M12A variant ships standard. Order CIL039-F2.8-M12A650 with the 650nm IR cut filter for daylight machine vision, or CIL039-F2.8-M12B650 in the M12B configuration with a 650nm IR cut filter. You can confirm coverage the field of view calculator.

The lens is mechanically compatible with the Commonlands CLA018 lens holder, e-con Systems S-mount boards (7-11mm tall mount), Allied Vision Alvium, FLIR Blackfly S, iDS uEye LE (Rev1.1 only; Rev1.2 requires removing glass), The Imaging Source M12, and Basler Dart cameras.

Commonlands ships this lens same day from San Diego for orders placed before 12 PM PST. We 100% MTF test every unit. Trioptics test data and mechanical drawings are available on request.