Tell me about the principle of mysterious pinhole photography, the similarities and differences between pinhole photography and digital photography, and why some photographers like pinhole photography

Tell me about the principle of mysterious pinhole photography, the similarities and differences between pinhole photography and digital photography, and why some photographers like pinhole photography at present. Aperture imaging is a physical optical principle. Using pinhole imaging principle, imaging directly on photographic paper requires accurate perception of light and image distance (focal length), which is the most primitive way to take pictures.

Small holes, equivalent to the lens and aperture of a digital camera; Photographic paper, equivalent to photoreceptor; The opening time of the small hole is equivalent to the shutter speed; The distance from the front baffle where the small hole is located to the photographic paper is equivalent to the back focal length of the lens; The size and angle of the back focal length determine the shooting range of the scene. Using this principle to take pictures, it is necessary to accurately measure the focal length range before and after, determine the size of photographic paper, and determine the exposure time in advance. Nowadays, digital cameras are controlled by cameras in full automatic mode or scene mode or program automatic mode or priority mode, and photographers only have composition.

Nowadays, only a few photographers like pinhole photography. Probably pinhole photography is the most primitive, simple and authentic photography.