3mm Wide Angle M12 Lens for up to 1/2.6" such as IMX415

CIL327 is an ultra-wide M12 lens built around a 2.7mm effective focal length and available in F/1.5 and F/1.8 versions. It delivers a 169° field of view, is specified for a 1/2.6" sensor format, and uses a 7.1mm image circle. The listed optical resolution is 3MP with 3μm pixels for the F/1.5 version, and total weight is 7g.

This lens is aimed at wide coverage with more light throughput than a typical compact board lens. The fast F/1.5 option helps maintain exposure and frame rate in low-light scenes, while the -13% F-theta distortion at a 7.1mm image circle gives a predictable ultra-wide mapping instead of a rectilinear look that would be difficult to hold at this angle.

CIL327 uses an all-glass, aluminum construction, which is the right choice when temperature stability matters. The listed mechanical version is ingress-protected and described as IP67 in the mechanical data. That makes it easier to use in outdoor or vehicle-mounted cameras than an open barrel design.

If your system needs very wide coverage and strong low-light capability, CIL327 is the more aggressive option than a slower 2.7mm lens. The combination of 169° FoV, F/1.5, and all-glass construction fits embedded vision designs that need scene coverage first and still need usable performance at night or indoors.