US 12,169,323 B2
Zoom lens, optical apparatus, and method for manufacturing zoom lens
Takeshi Umeda, Fujisawa (JP)
Assigned to Nikon Corporation, Tokyo (JP)
Filed by Nikon Corporation, Tokyo (JP)
Filed on Apr. 26, 2023, as Appl. No. 18/139,801.
Application 18/139,801 is a division of application No. 17/123,597, filed on Dec. 16, 2020, granted, now 11,668,899.
Application 17/123,597 is a division of application No. 16/503,615, filed on Jul. 4, 2019, granted, now 10,908,388, issued on Feb. 2, 2021.
Application 16/503,615 is a division of application No. 15/545,706, granted, now 10,379,319, issued on Aug. 13, 2019, previously published as PCT/JP2016/052735, filed on Jan. 29, 2016.
Claims priority of application No. 2015-017212 (JP), filed on Jan. 30, 2015.
Prior Publication US 2023/0258907 A1, Aug. 17, 2023
Int. Cl. G02B 9/60 (2006.01); G02B 13/02 (2006.01); G02B 15/14 (2006.01); G02B 15/177 (2006.01); G02B 27/00 (2006.01); G02B 27/64 (2006.01)
CPC G02B 9/60 (2013.01) [G02B 13/02 (2013.01); G02B 15/145527 (2019.08); G02B 15/177 (2013.01); G02B 27/0025 (2013.01); G02B 27/646 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A zoom lens comprising, in order from an object along an optical axis:
a first lens group having a negative refractive power;
a second lens group having a positive refractive power;
a third lens group having a negative refractive power; and
a fourth lens group, wherein
when the zoom lens performs zooming, the first lens group, the second lens group, the third lens group, and the fourth lens group move along the optical axis, a distance between the first and second lens groups changes, a distance between the second and third lens groups changes, and a distance between the third and fourth lens groups changes,
the first lens group comprises, in order from the object along the optical axis, a negative lens, a negative lens, a negative lens, and a positive lens,
the third lens group consists of one lens component having negative refractive power, and
the following conditional expression is satisfied:
1.500<(−f3)/fw<7.000
where
f3: a focal length of the third lens group,
fw: a focal length of the zoom lens in a wide-angle end state.