Low Distortion 5.2mm M12 Lens for up to 1/1.8" Sensors such as AR2020

The CIL232 is a 3.1mm M12 fisheye lens with a 200° field of view, built for sensors up to 1/1.7" format. At F/1.9, 12g, and 8.8mm image circle, it packs serious wide-angle capability into a miniature IP67-sealed package. The all-glass, aluminum barrel construction handles temperature swings without focus drift — this is an athermalized design.

The distortion profile sits under 10% F-Theta, which is well-controlled for a lens this wide. On the IMX728 or AR0823, you get 12MP+ resolution at 1.85μm pixel pitch across the full 181° at 8.8mm image circle. For surround-view, drone downward-facing, or 360° stitching applications, that angular coverage eliminates blind spots without needing multiple cameras.

Two filter options: order CIL232-F1.9-M12A650 with the 650nm IRC for daylight imaging, or CIL232-F1.9-M12ANIR without the filter for NIR-sensitive applications. The M12A variant is IP67-sealed with BBAR coating on the first lens surface. All-glass all-metal construction keeps weight at 12g total.

Compatible with the Commonlands CLA019-LCP lens holder. Also works with e-con Systems boards (8–13mm tall mount), Allied Vision Alvium, FLIR Blackfly S, iDS uEye XLS, The Imaging Source, and Basler Dart S-mount cameras. Use https://commonlands.com/pages/camera-field-of-view-calculator to model exact coverage on your sensor.

Ships same day from San Diego for orders before 12 PM PST. Trioptics MTF test data and mechanical drawings available on request. For depth of field estimates at your target working distance, try https://commonlands.com/pages/camera-depth-of-field-calculator.