← Broadcasting 1 Test
5 Written Questions
5 Matching Questions
- macro position
- minimum object distance (MOD)
- a Adjustable lens-opening that controls the amount of light passing through the lens. Also called diaphragm or lens diaphragm.
- b A lens setting that allows it to be focused at very close distances from an object. Used for close-ups of small objects.
- c automated feature whereby the camera focuses on what it senses to be your target
- d Iris opening of a lens, usually measured in f-stops
- e How close the camera can get to an object and still focus on it.
5 Multiple Choice Questions
- 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.
- a picture is in focus when it appears sharp and clear onscreen (technically, the point where the light rays refracted by the lens coverage).
- Gives a close-up view of an event relatively far away from the camera. Also called long-focal-length or telephoto lens.
- the distance from the optical center of the lens to the front surface of the camera's imaging device at which the image appears in focus with the lens set infinity. Focal lengths are measured in millimeters or inches. Short-focal-length lenses have a wide angle of view (wide vista); long-focal-length (telephoto) lenses have a narrow angle of view (close-up). In a variable-focal-length (zoom) lens, the focal length can be changed continuously from wide-angle (zoomed out) to narrow-angle (zoomed in) and vice versa. A fixed-focal-length (or prime) lens has a single designated focal length.
- a lens or zoom lens position with a focal length that approximates the spatial relationships of normal vision.
5 True/False Questions
CALIBRATE → to preset a zoom lens to remain in focus
digital zoom lens → Simulated zoom by cropping the center portion of an image and electronically enlarging the cropped portion. Digital zooms lose picture resolution.
zoom lens → 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.
range extender → An optical attachment to the zoom lens that extends its focal length. Also called extender.
fast lens → 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.