| 摘要 |
PROBLEM TO BE SOLVED: To obtain a zoom lens whose entire length is shortened and which is excellent in portability, is suitable for an electronic stall camera and is composed of three groups, and optical equipment using the zoom lens. SOLUTION: This zoom lens is provided with three lens groups, that is, a 1st lens group having negative refractive power, a 2nd lens group having positive refractive power, and a 3rd lens group having positive refractive power in order from an object side, and power is varied by changing a distance between the respective lens groups. The 1st lens group is provided with one negative lens and one positive lens, and the 2nd lens group is constituted of a pair of doublets and one positive lens, and the 3rd lens group is provided with at least one positive lens.
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