The classification of the lens can be classified according to the focal length, according to the aperture and according to the lens telescopic adjustment.
⑴. According to the focal length classification of a fixed focal length, retractable, automatic aperture or manual aperture and other types.
⑵. According to the focal length of the digital classification of a standard lens, wide-angle lens, telephoto lens and other types.
⑶.According to the aperture sub-categories are fixed iris, manual iris, auto iris and other types.
⑷. According to the lens retractable adjustment methods include automatic retractable lens, retractable lens and other types of manual.