| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens whose resolution is high and whose distortion aberration is small by effectively arranging an aspherical lens and a compound aspherical lens, and which is compact when it is used and when it is retracted and housed. SOLUTION: The zoom lens is constituted of a 1st lens group and a 2nd lens group in order from an object side, and the 1st lens group has negative refractive power and is constituted by arranging a 1st lens being a meniscus lens having negative refractive power (hereinafter referred to as a negative lens) and a 2nd lens being a meniscus lens having positive refractive power (hereinafter referred to as a positive lens), and the 2nd lens group has positive refractive power and is constituted by arranging a 3rd lens being a positive lens, a 4th lens being a positive lens, a 5th lens being a negative lens used in a cemented state to the 4th lens and a 6th lens having weak power. Then, power is varied by moving the 1st lens group and the 2nd lens group positionally. COPYRIGHT: (C)2005,JPO&NCIPI
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