Meterial is glass and metal case,no plastic,So it can be used for high temperature and cold environment(-20 to 60). | the coating machine for muti-layer coating has excellent transmittance,effectively eliminate stay light and halo features. | it can be supported by OV4689/OV5658 Sensor | Wide length 6mm to 22mm.long distance about 50m,High precision machining and optical design ensures that every length can get a clear image.Support IR Function,it can be used in the night. | lens has very precision BFL,It's ensure that no loss of length in the night.lens has large aperture F2.0,it supports Starlight Camera,makes colourful image in night!