A 35-mm camera is used to photograph a kitten. The camera isequipped with a standard
Chapter 9, Problem Challenges 9(choose chapter or problem)
A 35-mm camera is used to photograph a kitten. The camera isequipped with a standard lens that has a focal length of 50 mm. Thecamera is focused by moving the lens closer to or farther away fromthe film at the back of the camera.(a) First the kitten is photographed when it is 350 mm (13.8 in.) infront of the camera lens. Use the lens formula to compute thedistance that the lens must be from the film for the image to bein focus.(b) Compute the magnification and the height of the image, assum-ing 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.
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