An intermediate telephoto lens system includes a positive front lens group, a variable-aperture diaphragm, and a positive rear lens group, in this order from the object.
The positive front lens group includes a positive first lens element L1, a positive second lens element L2 and a negative third lens element L3, in this order from the object.
The positive rear lens group includes cemented lens elements having a negative fourth lens element L4 and a positive fifth lens element L5, and a positive sixth lens element L6, in this order from the object.
The intermediate telephoto lens system satisfies the following condition:
2.0<
f/f12<3.0 (1)
- wherein
- f designates the focal length of the entire intermediate telephoto lens system; and
- f12 designates the combined focal length of the positive first lens element L1 and the positive second lens element L2.