Patent ID: 11269166

Abstract:
A zoom lens system includes: a first group of lenses having positive power; a second group of lenses having negative power; a third group of lenses having positive power; a fourth group of lenses having negative power; and a fifth group of lenses having power, which are arranged in this order from an object toward an image. While this system is zooming, intervals between these groups change and the fifth group of lenses moves toward the object. This system satisfies 0.12<T35t/TLt<0.25, where T35t is a distance, measured at telephoto end, from one surface, closest to the image, of the third group of lenses to another surface, closest to the object, of the fifth group of lenses, and TLt is a distance, measured at the telephoto end, from one surface, closest to the object, of the first group of lenses to an image plane.