| 摘要 |
PROBLEM TO BE SOLVED: To obtain a zoom lens having a wide angle of view and also having high optical performance all over the variable power range, and an optical equipment having the zoom lens. SOLUTION: This zoom lens is provided with 1st, 2nd, 3rd, 4th and 5th lens groups respectively having negative, negative, positive, negative and positive refractive power in order from the object side. In order to perform variable power from a wide angle end to a telephoto end, the 1st lens group is moved along a part of a locus projected to an image side, and the 2nd, the 3rd, the 4th and the 5th lens groups are moved so that space between the 1st and the 2nd lens groups can be smaller, space between the 2nd and the 3rd lens groups can be smaller, space between the 3rd and the 4th lens groups can be larger, and space between the 4th and the 5th lens groups can be smaller at the telephoto end than at the wide angle end, then the focal distance of an i-th lens group is properly set.
|
