Why shoot the camera when the camera close to the front stretch?
The camera is made of a convex lens
When shooting close
The lens stretched forward
Far away from film
So that the image can fall on the film
According to the law of the imaging of the convex lens, the object distance is reduced and the image distance becomes larger. Close to the scene when the material is small, then the distance will become larger, and the camera's film can not move, then increase the image distance, only the camera's lens forward to increase the image distance.
