| 摘要 |
<P>PROBLEM TO BE SOLVED: To downsize the size of a device by suppressing an occurrence of chromatic aberration in a zoom lens with a wide angle and high variable power ratio. <P>SOLUTION: The zoom lens has: a positive first group of lenses G1 which are fixed when varying power; a second group of lenses G2 having negative refractive power which are monotonously moved in the direction of an optical axis when varying power; and a subsequent group of lenses Ge having positive refractive power as a whole in this order from the object side. In this case, the first group of lenses G1 has: a first group first lens section G11 comprising two or less lenses both having negative refractive power; a first group second lens section G12 having two lenses which are a positive lens having a convex surface facing the image side and a negative meniscus lens having a concave surface facing the object side arranged in this order from the object side; and a first group third lens section G13 with one negative lens and at least two positive lenses consecutively arranged in this order from the object side. <P>COPYRIGHT: (C)2012,JPO&INPIT |
