10–39. Moving the diaphragm control one full  stop  requires  doubling  the time of exposure. What effect does that settinq change have on the  aperture  opening  and  the exposure? 1. It  increases  the  aperture opening and doubles the exposure 2. It  decreases  the  aperture opening and halves the exposure 3. It  decreases  the  aperture opening but does not change the  exposure 4. It  increases  the  aperture opening but does not change the  exposure 10–40. To stop movement or action in a picture,  you  should  consider  all except  which  of  the  following details? 1. The relative movement of the subject 2. The subject’s direction of movement 3. The  camera–to-subject  distance 4. The depth of field 10–41. Depth of field depends on all except  which  of  the  following factors? 1. The focal length of the lens 2. The  lens  aperture 3. The distance focused on 4. The sensitivity of the film 10-42. With a given camera and lens system,  what  factor  affecting  the depth of field can NOT be changed by  the  cameraman? 1. The  lens  opening 2. The  focus  distance 3. The focal length of the lens 10–43. You want to photograph an object in sharp detail with the background  out  of  focus. The object is six feet from your camera lens. What is the best f/stop  setting? 1. f/4.5 2. f/ll 3. f/16 4. f/32 IN ANSWERING QUESTIONS 10-44 THROUGH 10-49, ASSUME THAT THE SUBJECT IS 25 FEET FROM THE CAMERA AND IS MOVING IN THE DIRECTION AS DESCRIBED IN FIGURE 11-21 OF THE  TEXTBOOK. SELECT THE RESPONSE OF THE MINIMUM SHUTTER SPEED SETTING FOR EACH ACTION  USED  AS  THE  QUESTION. 10-44. A base runner in a baseball game 10–45. 10–46. 10–47. running at right angles to the line of sight of the camera. 1. 1/125   sec 2. 1/250   sec 3. 1/500   sec 4. 1/1000 sec A boy riding a bicycle toward you at about 8 miles per hour. 1. 1/125   sec 2. 1/250   sec 3. 1/500   sec 4. 1/1000 sec A  horse  galloping  toward  you in a diagonal direction. 1. 1/125   sec 2. 1/250   sec 3. 1/500   sec 4. 1/1000 sec An  automobile  accelerating  in front of and away from you at about 35 miles per hour. 1. 1/125   sec 2. 1/250   sec 3. 1/500   sec 4. 1/1000 sec 68