1.The CCTV lenses: different models of fixed lenses, zoom lenses, pinhole,auto- iris lenses, Board lenses and so on.
2. The special Optical lenses: x-ray, low light lenses, big aperture and zoom times lenses, and so on.
3. The binoculars: different varieties of binoculars, monoculars, zoom binoculars and numeral binoculars, and so on
