| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a positive lead type zoom lens configured to satisfactorily correct a chromatic aberration, and obtain satisfactory optical characteristics in an entire zoom range. <P>SOLUTION: A zoom lens comprises, from an object side to an image side in this order: a first lens group having positive power; a second lens group having negative power; an aperture diaphragm; an intermediate group including one or more lens groups; and a rear lens group having positive power. The zoom lens performs zooming by moving the lens groups. In the zoom lens, power ϕ1d in d line, power ϕ1C in c line, and power ϕ1g in g line of the first lens group, and power ϕLd in d line, power ϕLC in C line, power ϕLg in g line of the rear lens group, wavelength λd, λC and λg in d line, C line and g line are appropriately set. <P>COPYRIGHT: (C)2013,JPO&INPIT |
