| 摘要 |
Disclosed herein is a variable focal length lens system including a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The first to the fifth lens groups are arranged in order from an object side. The variable focal length lens system satisfies following conditional expressions (1) to (3): 0.95<f13T/ft<1.4   (1) 0.08<f2/f4<0.3   (2) 0.06<&Dgr;3/ft<0.22   (3) where f13T is combined focal length of the first to third lens groups in the telephoto end state, ft is focal length of the lens system as a whole in the telephoto end state, f2 is focal length of the second lens group, f4 is focal length of the fourth lens group, and &Dgr;3 is an amount of travel of the third lens group from the wide-angle end state to the telephoto end state.
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