Back to results
US 6,028,714 AGranted
Zoom lens
AssigneeCanon Kabushiki Kaisha
InventorTakeshi Koyama
Life of this patent
Estimating the term…
Abstract
A zoom lens comprises a plurality of lens units movable along an optical axis for zooming and a lens unit movable along the optical axis for focusing, wherein the focusing lens unit moves integrally with one lens unit of the plurality of lens units in at least one zooming zone, and, in another zooming zone, moves while varying a separation thereof relative to the one lens unit.
Claims2
A zoom lens having a plurality of discrete zooming portions, said zoom lens comprising:
- a plurality of lens units which move along an optical axis while changing spaces during shifting from a predetermined discrete zooming portion to a different discrete zooming portion, each of said plurality of lens units moving with a constant space in each of the plurality of discrete zooming portions.
Dependencies are inferred from the claim text.