US 12,222,482 B2
Zoom lens, optical apparatus and method for manufacturing the zoom lens
Saburo Masugi, Kawasaki (JP)
Assigned to Nikon Corporation, Tokyo (JP)
Filed by Nikon Corporation, Tokyo (JP)
Filed on Jul. 2, 2021, as Appl. No. 17/367,306.
Application 17/367,306 is a division of application No. 15/781,136, granted, now 11,099,366, previously published as PCT/JP2016/086814, filed on Dec. 9, 2016.
Claims priority of application No. 2015-240654 (JP), filed on Dec. 9, 2015.
Prior Publication US 2021/0333528 A1, Oct. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G02B 15/14 (2006.01); G02B 13/02 (2006.01); G02B 15/173 (2006.01); G02B 15/20 (2006.01); G02B 13/00 (2006.01); G02B 13/18 (2006.01); G02B 27/64 (2006.01)
CPC G02B 15/20 (2013.01) [G02B 13/02 (2013.01); G02B 15/145121 (2019.08); G02B 15/173 (2013.01); G02B 13/0045 (2013.01); G02B 13/18 (2013.01); G02B 15/14 (2013.01); G02B 27/646 (2013.01)] 9 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; an aperture stop; 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, wherein
a lens closest to the object in the third lens group is a single lens having positive refractive power,
upon zooming from a wide-angle end state to a telephoto end state,
the fourth lens group moves toward the object monotonically,
a distance between each of lens groups and a lens group adjacent thereto changes to satisfy the following conditional expression:
3.50<|MV5/MV2|<11.50
where
MV5 denotes, upon zooming from the wide-angle end state to the telephoto end state, a moving amount of the fifth lens group with an image surface as a reference; and
MV2 denotes, upon zooming from the wide-angle end state to the telephoto end state, a moving amount of the second lens group with the image surface as a reference,
wherein the zoom lens satisfies the following conditional expression:
5.0<ωt<25.0
where
ωt denotes a half angle of view (unit: degree) of the zoom lens as a whole in the telephoto end state.