| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable power optical system having a high variable power ratio, being compact, and achieving high optical performance even during focusing, and to provide an optical device and a method for manufacturing the variable power optical system.SOLUTION: The variable power optical system includes, in order from the object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, and a third lens group G3 having positive refractive power. When varying power from a wide angle end state to a telephoto end state, the distance between the first lens group G1 and the second lens group G2, and the distance between the second lens group G2 and the third lens group G3 are changed. The third lens group G3 includes an F lens group GF having positive refractive power and being moved along the optical axis during focusing from an infinite object to a short distance object. |
