1.Zoom adjustment:Zoom adjustment 10-30 times random adjustment. 2.30mm large objective lens flatness thread: The 60mm large objective lens increases the brightness, and the spray matte paint on the inner wall of the objective lens effectively prevents the light from scattering in the object lens cone and eliminates stray light. Coated with dust-proof grease, absorbs dust and particulate matter. 3.15mm large wide-angle eyepiece:Some optical lenses, coated blue tape evepieces are adopted. The system consists of a part and a single piece. At night, the observed object has a weak light and the black state cannot be observed clearly. 4.Optical lens Green film coating: Multi-layer synthetic coating technology, full optical lens, comfortable and easy to see the scene, increase the sharpness of the imaging, increase the transparent band wide and flat vision field, improve the eye protection effect and improve the color reduction.