HD Digital Night Vision Update Version Binocular
HD Digital Night Vision Update Version Binocular NVG Night Vision Goggle Metal PVS-15 Dummy Model TB1250 No Function Model Helmet Parts Turn on the auxiliary lighting when the environment is dark, and adjust the brightness of the auxiliary lighting source according to the distance from the object being observed. Night vision devices use low-light detectors. When there is a certain light source in the environment (such as street lights, moonlight), there is no need to turn on the auxiliary light source. You only need to adjust the focal length of the objective lens to make the observed objects clear. Environmental...