Assertion: lens | /r/Synonym | zoom lenses
Facets:
value: often
type: TEMPORAL
Source sentences:
text: Some lenses, called zoom lenses, have a focal length that varies as internal elements are moved, typically by rotating the barrel or pressing a button which activates an electric motor.
text: This compensation may be done by mechanical means (moving the complete lens assembly while the magnification of the lens changes) or optically (arranging the position of the focal plane to vary as little as possible while the lens is zoomed).
text: In addition to measurement in millimeters, lenses are often referred to as a wide angle lens, normal lens, telephoto lens, long lens, short lens, or as a zoom lens.
text: Zoom Ring: Not all camera lenses have this function, which allows you to adjust the focal length of the lens -- these lenses are called “zoom lenses” because they allow you to “
text: Lenses with focal lengths that can change are called zoom lenses and those that remain fixed are called prime lenses.
text: The lens changes focal length and increase magnification as it is zoomed.