ズームレンズおよび光学機器

Japanese Patent JP7414422

B2

To provide a positive-lead zoom lens which offers an increased focal length, a higher zoom ratio, and good correction for aberrations at the telephoto end.SOLUTION: A zoom lens provided herein consists of a first lens group L1 with positive refractive power configured to move while zooming, a second lens group L2 with negative refractive power, a third lens group L3 with positive refractive power configured to move while zooming, and a rear group comprising multiple lens groups (L4 and others.), arranged in order from the object side to the image side. The rear group includes an n-th lens group Ln with negative refractive power disposed on the most image side among all the lens groups configured to move while zooming, and an (n-1)th lens group Ln-1 with positive refractive power disposed next to the n-th lens group on the object side. The zoom lens satisfies conditions expressed as: 1.6<(β2 t/β2w)/(βn-1 t/βn-1w×βn-1 t/βn-1w)<3.0, 2.5