2X Extender LensPart #: 322-0152-00The attachable FLIR 2x Optical Extender lens doubles the range of performance when needed, without sacrificing the situational awareness benefits of the wide field of view lens. Compatible with First Mate HM-224 and HM-324 models. *NOTE: The 2x Optical Extender is not waterproof and should not be used in wet environments.