Importance

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Abstract

The invention relates to a zoom lens system which, albeit having a high zoom ratio, is reduced in terms of length during lens collapsing and at the wide-angle end as well as the telephoto end, with well-corrected aberrations. The zoom lens system comprises a front lens group G1 located nearest to the object side and a rear lens group G3 located nearest to the image side with at least one lens group located between G1 and G3. The group G1 has positive or negative refracting power and the group G3 has negative refracting power. For zooming from the wide-angle end to the telephoto end, a separation between adjacent lens groups varies. Specific conditions are satisfied with respect to the focal length of G3, the amount of movement of G3, and the zoom ratio shared by G3.

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First Claim