| 摘要 |
PROBLEM TO BE SOLVED: To provide: a variable magnification optical system that has satisfactory optical performance; an optical apparatus; and a method for manufacturing the variable magnification optical system. SOLUTION: The variable magnification optical system includes, in order from an object side: a first lens group G1 of positive refractive power; a second lens group G2 of negative refractive power; a third lens group G3 of positive refractive power; a fourth lens group G4 of negative refractive power; and a fifth lens group G5 of positive refractive power. In the variable magnification optical system, when performing variable power from a wide-angle-end state to a telephoto-end state, the interval between the first and second lens groups G1 and G2 vary, the interval between the second and third lens groups G2 and G3 vary, the interval between the third and fourth lens groups G3 and G4 vary, and the interval between the fourth and fifth lens groups G4 and G5 vary. In the variable magnification optical system, it is possible to adjust a position by eccentrically tilting the fifth lens group G5 so as to include a direction orthogonal to an optical axis, and a predetermined conditional expression is satisfied. COPYRIGHT: (C)2011,JPO&INPIT |
