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50-330mm F/4.0 Mwir Germanium Cooled Continuous Zoom Infrared Optical Chalcogen Lens for 640X512-15um, Find Details and Price about Infrared Germanium Lens Cooled Zoom Lens from 50-330mm F/4.0 Mwir Germanium Cooled Continuous Zoom Infrared Optical Chalcogen Lens for 640X512-15um - Nanjing Rising Opto-Electronic (S) Co., Ltd.