What is the quantifier unit of camera?

The quantifier unit of camera is "tai", "department", one camera, one camera.

The structure of early cameras was very simple, including only a camera obscura, a lens and photosensitive materials. It was much larger and heavier than today's cameras. The quantifier for cameras at that time was "stage", which is also consistent with reality. Modern cameras are more complex, with lenses, apertures, shutters, ranging, framing, metering, and film transfer. , counting, self-timer, focus, zoom and other systems are complex products that combine optics, precision machinery, electronic technology and chemistry. But it is small in size, exquisite and beautiful. When modern people talk about cameras, the quantifier is called "BU", a camera, which is similar to the quantifier unit of a mobile phone, a mobile phone, etc.

A camera is a device that uses optical imaging principles to form images and uses film to record the images. Many devices that can record images have the characteristics of a camera. Such as medical imaging equipment, astronomical observation equipment, etc. After the light reflected from the scene being photographed is focused through the photographic lens (objective lens) and the shutter that controls the exposure, the scene being photographed forms a latent image on the photosensitive material in the camera obscura, which is then processed (i.e. developed, fixed) to form a permanent image. image, this technique is called photography.

There are many kinds of cameras, which can be divided into landscape photography cameras, printing and platemaking cameras, digital cameras, microfilm cameras, microscopic cameras, underwater cameras, aerial cameras, high-speed cameras, etc. according to their uses; according to the film size, It can be divided into 110 camera (frame 13×17 mm), 126 camera (frame 28×28 mm), 135 camera (frame 24×18, 24×36 mm), 127 camera (frame 45x45 mm), 120 camera (including 220 Cameras, screen size 60×45, 60×60, 60×90 mm), disc cameras (frame size 8.2x10.6 mm); according to viewing methods, they are divided into perspective view cameras, twin-lens reflex cameras, and single-lens reflex cameras.