Principle of photography

Photography, commonly known as photography, is to use a camera to image the negative, and print the negative into a single photo, which is permanently preserved one by one. But the image of the photo is static and silent, just to let people watch its characters and artistic conception, and then understand its meaning.

Today, the earliest existing photos in the world can be traced back to 1827, from the Frenchman Joseph? The hand of neptune. Generally speaking, people take pictures with visible light, and cameras are the most commonly used. Because of different scenes and uses, cameras have many classifications. Generally speaking, a camera should have several basic parts to ensure the exposure process, including: photosensitive medium, imaging lens and exposure time.

Control mechanism, film cassette, storage medium.