To provide a zoom lens for miniaturizing and thinning by lessening the number of the constituents of an optical system, and to provide an electronic imaging device having it.
The imaging optical system has a positive lens group, a negative lens group, and a diaphragm. The optical system arranges the negative lens group at an object side from the diaphragm. The negative lens group has a cemented lens cementing a plurality of lenses. When a straight line expressed by Nd=α×νd+β (where, α=-0.017) is set in an orthogonal coordinate system making Nd of a horizontal axis and making νd of a vertical axis, Nd and νd of at least one lens constituting the cemented lens are included in both a region decided by straight lines at a lower limit and upper limit of the following condition inequality (1) and a region determined by the following condition inequalities (2) and (3). 1.45<β<2.15... (1), 1.58
| JP2019003198 | ZOOM LENS AND IMAGING APPARATUS |
| JP2020160264 | ZOOM LENS AND IMAGE CAPTURING DEVICE |
| JPH11305128 | VARIABLE FOCAL DISTANCE LENS SYSTEM |
Adachi important person
Keisuke Ichikawa
Yasushi Iga Exhibition
Koji Matsumoto
Kazuaki Murayama
Keigo Matsuo
Hideki Nagata
| JP2001033701A | ||||
| JP8320434A | ||||
| JP2000305014A | ||||
| JP2000330016A | ||||
| JP7209582A | ||||
| JP2004069808A | ||||
| JP2004264786A |