5 Written Questions

1. a lens that permits a relatively great amount of light to pass through at its maximum aperture (relatively low f-stop number at its lowest setting). Can be used in low light conditions.
2. Simulated zoom by cropping the center portion of an image and electronically enlarging the cropped portion. Digital zooms lose picture resolution.
3. The degree to which the focal length can be changed from a wide shot to a close-up during a zoom. The zoom range is often stated as a ratio; a 20:1 zoom ratio means that the zoom lens can increase its shortest focal length twenty times.
4. A short-focal-length lens that provides a broad vista of a scene.
5. automated feature whereby the camera focuses on what it senses to be your target

5 Matching Questions

1. DEPTH OF FIELD
2. servo zoom control
3. macro position
4. SELECTIVE FOCUS
5. slow lens

1. a The area in which all objects, located at different distances from the camera, appear in focus. Depth of field depends in the focal length of the lens, its f-stop, and the distance between the object and the camera.
2. b Emphasizing an object in a shallow depth of field through focus while keeping its foreground and/or background out of focus.
3. c Zoom control that activates motor-driven mechanisms.
4. d A lens that permits a relatively small amount of light to pass through at its maximum aperture (relatively high f-stop number at its lowest setting). Can be used only in well-lighted areas.
5. e A lens setting that allows it to be focused at very close distances from an object. Used for close-ups of small objects.

5 Multiple Choice Questions

1. A lens that can be programmed through a small built-in computer to repeat zoom positions and their corresponding focus settings.
   1. slow lens
   2. zoom lens
   3. digital zoom lens
   4. digital zooming
2. a lens or zoom lens position with a focal length that approximates the spatial relationships of normal vision.
   1. normal lens
   2. focal length
   3. slow lens
   4. zoom lens
3. How close the camera can get to an object and still focus on it.
   1. FIELD OF VIEW
   2. minimum object distance (MOD)
   3. DEPTH OF FIELD
   4. range extender
4. a picture is in focus when it appears sharp and clear onscreen (technically, the point where the light rays refracted by the lens coverage).
   1. FOCUS
   2. auto-focus
   3. IRIS
   4. F-STOP
5. the crowding effect achieved by a narrow-angle (telephoto) lens wherein object proportions and relative distances seem shallower
   1. F-STOP
   2. zoom lens
   3. macro position
   4. compression

5 True/False Questions

1. CALIBRATE → to preset a zoom lens to remain in focus

   True        False

2. focal length → a lens or zoom lens position with a focal length that approximates the spatial relationships of normal vision.

   True        False

3. range extender → An optical attachment to the zoom lens that extends its focal length. Also called extender.

   True        False

4. narrow-angle lens → Gives a close-up view of an event relatively far away from the camera. Also called long-focal-length or telephoto lens.

   True        False

5. IRIS → Adjustable lens-opening that controls the amount of light passing through the lens. Also called diaphragm or lens diaphragm.

   True        False