As shown in the picture, A and B are two photos of the same object taken by the photographer with the same camera. Please judge and shoot _ _ _ _ _ _ (optional.

Both pictures were taken by cameras, and they must be real scenes.

When the convex lens forms a real image, the object distance decreases, the image distance increases and the image increases.

A photo has a large image, a large image distance and a small object distance, so the camera is closer to the object and the black box is elongated.

The second photo has a small image, a small image distance and a large object distance, so the camera is far away from the object and the black box is shortened.

So, the answer is: b; Stretch.