US 11,914,125 B2
Zoom lens, optical apparatus and method for manufacturing the zoom lens
Atsushi Suzuki, Tokyo (JP); Kenji Ishida, Mitaka (JP); and Saburo Masugi, Kawasaki (JP)
Assigned to Nikon Corporation, Tokyo (JP)
Filed by Nikon Corporation, Tokyo (JP)
Filed on Oct. 12, 2020, as Appl. No. 17/067,898.
Application 17/067,898 is a division of application No. 15/462,811, filed on Mar. 18, 2017, granted, now 10,816,781.
Application 15/462,811 is a continuation of application No. PCT/JP2015/004803, filed on Sep. 18, 2015.
Claims priority of application No. 2014-193360 (JP), filed on Sep. 24, 2014; application No. 2015-033647 (JP), filed on Feb. 24, 2015; application No. 2015-033648 (JP), filed on Feb. 24, 2015; and application No. 2015-033649 (JP), filed on Feb. 24, 2015.
Prior Publication US 2021/0026119 A1, Jan. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 15/16 (2006.01); G02B 15/20 (2006.01); G02B 15/14 (2006.01); G02B 5/20 (2006.01)
CPC G02B 15/16 (2013.01) [G02B 5/208 (2013.01); G02B 15/1461 (2019.08); G02B 15/145105 (2019.08); G02B 15/145117 (2019.08); G02B 15/145121 (2019.08); G02B 15/145129 (2019.08); G02B 15/20 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A zoom lens comprising, in order from an object, a first lens group having positive refractive power, a second lens group having negative refractive power, a third lens group having positive refractive power, a fourth lens group having negative refractive power, and a fifth lens group having positive refractive power,
respective distances between all adjacent lens groups among the first to fifth lens groups being changed upon zooming,
the first lens group being composed of three or more lenses,
the second lens group consisting of a negative meniscus lens having a concave surface facing an image, a negative lens, a positive biconvex lens, and a negative lens, arranged in order from the object,
the third lens group comprising two negative meniscus lenses both having a concave surface facing the image,
the fourth lens group being composed of two or less lenses,
the fifth lens group being composed of two or less lenses and moving upon zooming from a wide angle end state to a telephoto end state,
the fifth lens group consisting of a positive lens and a negative lens, and
the following conditional expressions being satisfied:
0.01<D1/ft<0.15
0.03<Mv2/ft
where
D1 denotes a distance on an optical axis from an object side surface of the first lens group to an image side surface of the first lens group,
ft denotes a focal length of the zoom lens in the telephoto end state, and
Mv2 denotes amount of movement of the second lens group upon zooming from the wide angle end state to the telephoto end state.