Increasing the diameter of a camera lens, while keeping its focal length unchanged, does more than just brighten the image on the film so that you can use a shorter exposure. It also
A. decreases the depth of focus so that objects at different distances will no longer all be in focus at once.
B. increases the size of the image on the film so that you get a close up.
C. decreases the size of the image on the film so that you get a wide angle view.
D. increases the depth of focus so that objects at different distances will all be in focus at once.
Answer:A
Increasing the diameter of a camera lens, while keeping its focal length unchanged, does more than just brighten the image on the film so that you can use a shorter exposure. It also
A. decreases the depth of focus so that objects at different distances will no longer all be in focus at once. B. increases the size of the image on the film so that you get a close up. C. decreases the size of the image on the film so that you get a wide angle view. D. increases the depth of focus so that objects at different distances will all be in focus at once.