Patent ID: 6108137
Filing Date: 2000-08-22
Classification: G02B

Abstract:
A zoom lens system comprising:a) a zoom lens for forming a real image of an object and having a plurality of lens groups movable along an optical axis;b) a zoom lens barrel, housing said zoom lens, for moving said plurality of lens groups into three or more positional states, including an extreme wide-angle positional state, an extreme telephoto positional state, and an intermediate positional state located therebetween; andc) means for guiding said plurality of lens groups along said optical axis such that when said plurality of lens groups is in said extreme telephoto positional state, at least one of said plurality of lens groups moves toward the image, and when said plurality of lens groups is in said extreme wide-angle positional state, said at least one of said movable lens groups moves toward the object when focus is adjusted from an object at an infinite distance to an object at a short distance.