A low-light camera is a low-light camera with a sensitivity lower than 0. 1Lux and higher than 0.0 1Lux. A camera with a sensitivity lower than 0.0 1Lux is called moonlight level, and a camera with a sensitivity higher than 0.00 1Lux is called starlight level. Low-illumination cameras with sensitivity lower than 0.000 1lux are sensitive to starlight and have the lowest illumination.

Illuminance, that is, light intensity, is a physical term, which refers to the energy of visible light received per unit area. Unit: Lux, abbreviated as Lx. [2] The illuminance mentioned in the security industry is expressed in lux.

0Lux means you can shoot without light. Generally, most cameras are at 0Lux or 0. 1Lux, and the illumination value depends on the aperture size (f value) of the lens. The smaller the f value, the lower the required illumination.