Thermal Imaging Front Attachment Krypton 2 is a multipurpose device that allows you to quickly and easily transform a daylight riflescope into a thermal imaging one. The attachment is mounted on the lens of an riflescope with the help of adapters designed for various lens diameters. The attachment does not require any additional adjustment. The attachment is intended for various applications, including hunting, sport shooting, night photography & video recording, and surveillance.