Why are the infrared perspective photos of beautiful women all black and white or green, and red is monochrome, not color? Infrared lens can't shoot color?

Because infrared light is invisible to the naked eye. A camera converts light into an image. There is no color in itself, so the converted image is monochrome. Infrared lenses are divided into high-band and low-fluctuation. The high-band is opaque, and the camera can only shoot infrared light, which is monochrome. If it is a low-band transparent filter, the camera shoots a certain color. A treasure's filter also has multiple bands, so you can ask more questions. Monochrome effect, the default monochrome of different cameras after infrared modification is not necessarily black and white. Some are green, some are red, but most of them can be set. In addition, infrared photography should not invade the privacy of others. It can be used for night vision and scientific research.