Theia's true 4K resolution telephoto lens for long distance security surveillance and license plate recognition (LPR) applications.  With varifocal length from 12-50mm and superior imaging performance, the SL1250 is designed for image sensors from 1/2.3" up to 1/1.7".   The lens is designed to be very compact so it can be used in small enclosures such as 4" domes.