Yiwu Tianying Optical Instrument Co., Limited. is the most innovative company for design, manufacture and sell. It is located in the world famous Commodity City - Yiwu China. At TianYing of mature leading advanced 5km~50km 1Hz~20Hz laser rangefinder, electro-optical turret systems, 300mm~2000mm focal length coaxial zoom CCTV cameras and telephoto thermal cameras are widely recognized as the most innovative, highest quality made, and highest performance price rate. Some of the products have reached the domestic leading and world advanced level. Our company holds great general advantages in the fields of optical lens design, optical components fabrication, infrared thermal imaging technique, l ... more