| 摘要 |
PROBLEM TO BE SOLVED: To provide a zoom lens which has a high photographic magnification and can be easily focused onto an object at a proximate distance although the entire system is small in size and has high performance.SOLUTION: The zoom lens comprises a plurality of lens groups, in which an interval between adjoining lens groups varies upon zooming; and the zoom lens includes, successively from an object side to an image side, a lens group Ln having the highest negative refractive power, a lens group Lm2 having a positive refractive power, a lens group Lm having a negative refractive power, and a rear group Lp including one or more lens groups and as a whole having a positive refractive power. Upon focusing from an infinite object to a short-distance object, the lens group Ln is moved toward the object side, and a focal distance denoted by Fof the lens group Lm and a focal distance denoted by Fof the lens group Lm2 are each appropriately set. |
