| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable power optical system having good optical performance, and to provide an optical device and a method of manufacturing the variable power optical system. SOLUTION: The variable power optical system includes 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; a fourth lens group G4 having negative refractive power; and a fifth lens group G5 having positive refractive power; wherein in the variable power operation from a wide-angle end state to a telephoto-end state, a distance between the first lens group G1 and the second lens group G2 varies, a distance between the second lens group G2 and the third lens group G3 varies, a distance between the third lens group G3 and the fourth lens group G4 varies, a distance between the fourth lens group G4 and the fifth lens group G5 varies, and a fifth lens group G5 is decentered to perform the positional adjustment. The variable power optical system satisfies predetermined conditional expressions. COPYRIGHT: (C)2011,JPO&INPIT |
