Title:
撮影レンズ、光学機器、および撮影レンズの製造方法
Document Type and Number:
Japanese Patent JP5867294
Kind Code:
B2
Abstract:
Provided is a photographing lens (ML) including a first lens group (G1) having positive refractive power, a second lens group (G2) having negative refractive power, and a third lens group (G3) having positive refractive power, the photographing lens being configured such that the second lens group (G2) moves along the optical axis upon focusing from an object at infinity to an object at a finite distance. The first lens group (G1) includes a front lens group (G1a) and a rear lens group (G1b) having a longest air interval from the front lens group (G1a) in the first lens group (G1), and the second lens group (G2) includes a negative lens (L21) and a cemented lens in which a positive lens (22) and a negative lens (23) are cemented in order from the object.
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Inventors:
Tetsushi Miwa
Application Number:
JP2012122709A
Publication Date:
February 24, 2016
Filing Date:
May 30, 2012
Export Citation:
Assignee:
NIKON CORPORATION
International Classes:
G02B13/00
Domestic Patent References:
| JP6201989A | ||||
| JP2005321574A | ||||
| JP11160617A | ||||
| JP2004126391A |
Attorney, Agent or Firm:
Masago Onishi
Hiroshi Kawano
Namiki Toshiaki
Hiroshi Kawano
Namiki Toshiaki