A camera is used to photograph a kitten. The camera is equipped with a standard lens that has a focal length of 50 mm. The camera is focused by moving the lens closer to or farther away from the film at the back of the camera.
(a) First the kitten is photographed when it is 350 mm (13.8 in.) in front of the camera lens. Use the lens formula to compute the distance that the lens must be from the film for the image to be in focus.
(b) Compute the magnification and the height of the image, assuming that the kitten is 100 mm tall.
(c) The kitten is then photographed from a distance of 3,500 mm (11.5 ft). Compute the lens-to-film distance, the magnification, and the image height.