What's the use of a sealed file camera?

The fly's compound eye, using the principle of compound eye, can have many lenses and focus at the same time to enhance the clarity.

A camera is a kind of equipment that uses the principle of optical imaging to form an image and records the image with a negative. This is an optical instrument used for photography. In modern social life, there are many devices that can record images, all of which have the characteristics of cameras, such as medical imaging equipment and astronomical observation equipment.

After the light reflected by the shot scene is focused by the camera lens and the shutter that controls the exposure, the shot scene forms a latent image on the photosensitive material in the camera box, and forms a permanent image after being developed and fixed. This technology is called photography, which is divided into general photography and professional photography.

There are many kinds of cameras, which can be divided into landscape cameras, printing and plate-making cameras, document microfilm cameras, microscopic cameras, underwater cameras, aerial cameras, high-speed cameras and so on. According to the size of photographic film, it can be divided into 1 10 camera (picture 13× 17mm), 126 camera (picture 28× 28mm) and 135 camera (picture 24×/35)

127 camera (screen 45x45mm), 120 camera (including 220 camera, screens 60x45, 60x60, 60x90mm) and disc camera (screen 8.2x10.6); According to the way of framing, it is divided into perspective framing camera, double-lens reflective camera and single-lens reflective camera.