| 摘要 |
A zoom optical system comprising, in order from an object side: a first lens group G1 having positive refractive power; a second lens group G2 having negative refractive power; and a rear lens group GR having positive refractive power; the rear lens group GR including at least a third lens group G3 that is disposed to the most object side and has positive refractive power, the third lens group G3 including at least four positive lenses L31-L33, L35 and at least one negative lens L34, at least a portion of a lens group disposed to an image side of the first lens group G1 being movable as a vibration reduction lens group in a direction including a component perpendicular to an optical axis, and a given conditional expression being satisfied, thereby providing a zoom optical system having excellent optical performance.
|
