| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable power optical system realizing miniaturization and high performance while restraining error sensitivity, and an imaging apparatus equipped with the same. SOLUTION: The variable power optical system for forming the optical image of an object on the light receiving surface of an imaging device so that power can be varied includes at least a 1st lens group GR1 having negative power and a 2nd lens group GR2 having positive power in order from an object side, and is constituted so that space between the 1st lens group GR1 and the 2nd lens group GR2 may be changed in varying the power. The 1st lens group GR1 comprises two or less lenses, and the 2nd lens group GR2 comprises three or less lenses, and the refractive index of at least one lens in the 2nd lens group GR2 is≥1.85. COPYRIGHT: (C)2006,JPO&NCIPI |
