| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens made compact and excellent in mass productivity though it has excellent optical performance, and an imaging apparatus using the zoom lens. SOLUTION: The zoom lens is constituted of a 1st lens group GR1 having negative refractive power and a 2nd lens group GR2 having positive refractive power, which are arranged in order from an object side, and performs variable power by changing space between two lens groups. The 1st lens group is constituted of a 1st lens G1 having negative refractive power and a 2nd lens G2 having positive refractive power, which are arranged in order from the object side, and the 2nd lens group is constituted of a 3rd lens G3 having positive refractive power, a 4th lens G4 having negative refractive power and a 5th lens G5 having positive refractive power, which are arranged in order from the object side, and the zoom lens satisfies a prescribed conditional expression. COPYRIGHT: (C)2005,JPO&NCIPI |
