| 摘要 |
Disclosed herein is a variable focal length lens system including: a first lens group having a positive refracting power; a second lens group having a negative refracting power; a third lens group having a negative refracting power; a fourth lens group having a positive refracting power; and a fifth lens group having a positive refracting power; all of the first to fifth lens groups moving, when a positional state of the variable focal length lens system changes from a wide angle end state to a telephoto end state; the fifth lens group being configured from a first sub lens group and a second sub lens group; and the variable focal length lens system satisfying the following expression (1): 0.5<Dsub/fw<0.9
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