When taking pictures, should we stay away from or close to the camera in order to capture the whole class? At the same time, how to put the camera's black box?

The photographer found that there were students on both sides who didn't enter the frame, indicating that the shot image was relatively large and should be relatively small. Therefore, the photographer should keep the camera away from the students, increase the object distance and reduce the image distance at the same time, so as to get a clear image on the film. So the length of the camera's black box should be shortened. What is formed on the film is an inverted and reduced real image.

So the answer is: stay away; Shorten; Shrinking; Pour; Real.