The core parts of the lens are the lens barrel(lens tube), spacer ring(gasket) and glass lens. Under the strict quality control of the company, our lens quality is stable and reliable. Received unanimous praise from the industry. Our main products: wide-angle lens, megapixel lens, standard focus lens, zoom lens, telephone lens, IR lens, Optics Lens; Mega Pixel lens, Vari-Focal lens , Infrared lens, Dome lens