Made by Ilex Optical this lens assembly is in great condition and is mounted. Has iris and focus adjustments. Optics are clear. 13mm f/1.5 ruggedized cine paragon. Photonics serial number: 738. Assembly is 3-5/8 inches long by 2.5 inches diameter and the mounting plate is 2.5 by 2.25 inches with 4 mounting holes. Iris and focusing adjustments are stuck. We don’t want to damage it so didn’t try to unstuck it. We found one on eBay for sale at $300.00 and its in Hong Kong!