Optical LensChina Manual Focus Ar Infrared Imaging Uncooled Detector Thermal Imager IR Snipescope 100mm 640*512-17um 8-12um Athermal Lens Focal Length 1.3 8-12um 88% 13.93mm, Find details about China IR Snipescope, 8um-12um from Manual Focus Ar Infrared Imaging Uncooled Detector Thermal Imager IR Snipescope 100mm 640*512-17um 8-12um Athermal Lens Focal Length 1.3 8-12um 88% 13.93mm