Name: Class: Date: Digital Imaging Study Questions Chapter 8 _/100 Total Points Homework Grade True/False Indicate whether the sentence or statement is true or false. 1. You can change the lens on most point-and-shoot digital cameras. 2. The focal length of a lens is measured in inched. 3. Every lens has at least one focal length. 4. Today zoom lenses have the same quality as a prime lens. 5. Different lens types will give you different results. 6. Prime lenses are usually faster lenses than the typical zoom lenses on most digital cameras. 7. A standard prime lens would be the best lens to use for action sports photography. 8. Many photographers buy other focal length lenses because of their angle of view. 9. The smaller the sensor, the smaller the angle of view, and the more telephoto a lens acts. 10. Many of the telephoto lenses today are designed to be compresses in size so that the lens is physically shorter than its focal length. 11. You can always tell if a lens is a zoom lens by the length of the lens. 12. Perspective comes from a relationship of size and distance. 13. Perspective will make objects in an image look the same size in all cases. 14. The largest f/stop on your lens will determine the smallest depth of field you can capture in your photos. 15. A wide angle lens tends to compress the subject with the background and make them look closer together than they really are. 16. Depth of field affects only perceived sharpness in depth and perspective deals with size changes in depth. 17. The longer the focal length of a lens the greater the apparent depth of field. 18. It is easier to get a great depth of field for an image if you are standing very close to the subject in the image you are taking. 19. Depth of field markings are placed on all digital camera lenses today. 20. If you want to flatten a scene be sure to use a wide angle lens. 21. The maximum f/stop is the widest aperture possible with a lens. 22. Larger telephoto lenses have a tripod socket built into the lens so that you can mount the lens onto a tripod. Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 23. What do you call a lens that has many focal lengths in one lens? a. single-focal=length lenses c. multiple focal length lenses b. fixed focal length lenses d. zoom lenses 1
Name: 24. Another name for a single-focal-length lens is... a. main lens c. prime lens b. single lens d. fixed lens 25. Which lens can be used to bring distant subjects closer, to isolate them and restrict what is seen in the frame. a. telephoto c. standard b. wide angle d. prime 26. If you want to show both the foreground and background which lens is a good choice? b. standard or normal d. super telephoto 27. Which lens can give you an distorted view of the subject because it shows so much of the image in the angle of view? a. telephoto c. fisheye b. wide angle d. super telephoto 28. If you want to get more of a scene in your image what type of lens should you use? a. telephoto c. wide-angle b. normal or standard d. super telephoto 29. Which of the following mm would indicate the focal length of a wide angle lens? a. 28mm c. 135mm b. 50mm d. 400mm 30. Which lens would see the world in a moderate way, neither very wide nor very telephoto? b. normal or standard d. super telephoto 31. What is the typical mm range for the normal lens when you are using a 35mm camera? a. 12-18 mm c. 45-55 mm b. 28-35 mm d. 135-200 mm 32. Which type of lens sees an increasingly smaller part of the scene so that the subject is magnified in the image area as the focal length increases? b. normal or standard d. supper telephoto 33. The term telephoto refers to a lens that is longer in focal length than... a. a wide angle lens c. a super telephoto lens b. a normal or standard lens d. none of the above 34. An example of the use of perspective would be taking an image of what? a. one basketball held up at arms length c. 3 basketballs all held up at the same from the camera b. two basketballs held up, one at arms length and one about 10 feet away from the camera distance from the camera d. one basketball held up so far away that you cannot set it in the image 35. What is the best f/stop to use to get a great depth of field in a landscape image you are taking? a. f2.8 c. f16 b. f8.0 d. f22 36. If you are taking a portrait of a friend and you want to blur the background to give a shallow depth of field, what would be the best f/stop to use? a. f2.8 c. f16 b. f8 d. f22 37. Which of the following does NOT affect depth of field in an image? a. aperture or f/stop c. using flash b. focal length d. focusing distance 2
Name: 38. If the you want the greatest depth of field in an image use which of the following aperture/shutter combinations? a. f2.8 at 1/500th c. f16 at 1/60th b. f8.0 at 1/125th d. f1.2 at 1/1000th 39. What type of lens is specifically designed for high sharpness at very close distance and focusing form infinity down to a 1:1 ratio? a. telephoto lenses c. wide angle lenses b. normal or standard lenses d. macro lenses 40. What would be the best lens to use for portraits? b. normal or standard d. macro 41. What would be the best lens for creating dramatic deep space and perspective effects? b. normal or standard d. macro 42. Which lens would be the best for making a scene look normal; avoiding dramatic effects? a. telephoto lens c. wide angle lens b. normal or standard lens d. macro lens 43. What is the name of the device that you can mount on the front of a lens to protect the glass and prevent unwanted rays of light from entering the lens? a. lens filter c. lens hood b. lens cap d. lens tripod mount Completion Complete each sentence or statement. 44. The on your camera controls what the sensor sees. 45. The length of a lens refers to the distance between its optical center and the focal plane (the sensor in a digital camera) when it focuses at infinity. 46. Different focal lengths change the _ of the subject at he focal plane. 47. A _ lens will have multiple focal lengths over a range of mm. 48. The the sensor, the the angle of view, and the more wide-angle a lens acts. 49. lenses not only bring in distant subjects, they also compress distances within the frame. 50. The term is used when a lens is shorter in focal length than a so-called normal lens in the mid-range focal lengths. 51. One very important use of focal length is to change in a scene. 52. in a photograph relates to how objects in a scene change in size as they move closer or farther from the camera. 53. When working with perspective a lens used with an image will have a deeper perspective and a _ lens used with an image will have a flatter perspective. 3
Name: 54. lenses have aberrations that cause sharpness and color problems. Short Answer 55. How does the focal length vary in lenses? 56. What are the two types of lenses that you should know about? 57. What is the key benefit of a zoom lens? 58. What are the three focal lengths for a specific camera when you have a fixed focal length lens on your camera? 59. Define depth of field and explain the three tings that affect the depth of field in any image. 60. What is meant by hyperfocal distance? 61. What is another name for a teleconverter lens and what is it used for? 62. What are two things that most lens manufacturers correct on their lenses? Explain the problems that can be caused if the lenses are not corrected. 4
Name: 63. What is an aspherical lens? 64. What do many of the modern lenses do to help you as a photographer get more stable images today? 65. Give two reasons for using a lens hood? 5