On what principle is the camera made?

A camera, referred to as a camera for short, is a device that uses the principle of optical imaging to form an image and records the image with a negative. Many devices that can record images have the characteristics of cameras. Medical imaging equipment, astronomical observation equipment, etc. A camera is an optical instrument used for photography. 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. Divided into general photography and professional photography.

The lens of the camera is a convex lens,

The camera is made by using the principle that the convex lens can reverse the image, shrink the image and realize the image.

Meet the conditions: (u >； when the object distance is more than twice the focal length; 2f)

When the camera is far away from the object, the lens retracts and the image becomes smaller;

(beyond twice the focal length, u becomes larger, v becomes smaller, and the image becomes smaller. )

When the camera gets closer and closer to the object being photographed, the lens stretches forward and the captured image becomes larger.

(Beyond the focal length of twice, the U becomes smaller, the V becomes larger, and the image becomes larger. )

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