| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact variable power optical system having a vibration-proof function, a high variable power, a wide angle of view and excellent optical performance, an optical device, and a method for manufacturing the variable power optical system.SOLUTION: A variable power optical system comprises, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power. When varying power from a wide angle end to a telephoto end, the distance between the first lens group G1 and the second lens group G2, the distance between the second lens group G2 and the third lens group G3, and the distance between the third lens group G3 and the fourth lens group G4 change. The third lens group G3 comprises, in order from the object side, a first partial group G31 having positive refractive power and a second partial group G32. The second partial group G32 moves in a direction including a direction component perpendicular to the optical axis. The variable power optical system satisfies a predetermined conditional expression. |
