Xiao Gang experimented with a convex lens with a focal length of 10cm when studying the "laws of convex lens imaging". The schematic diagram of the experimental device is shown in the figure.

(1) The object distance is 40 cm, the focal length of the convex lens is 10 cm, and the object distance is more than twice the focal length. According to the law of convex lens imaging, the object is inverted and reduced on the light screen.

When the candle is placed on the scale line of 20 cm, the object distance is 30 cm. The object distance becomes smaller and the image distance becomes larger, that is, the screen moves to the right and the image becomes larger.

So the answer is: shrinking; Right; Increase.

(2) After taking a bust of Xiaoming, the image formed by the camera becomes larger, the image distance becomes larger, and the object distance becomes smaller, so the distance between the camera and Xiaoming becomes smaller, and the distance between the lens and the film becomes larger.

Therefore, the answer to this question is: reduce; Increase.