| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a compact optical system satisfactorily correcting various aberrations and having excellent optical performance, an optical device, and a method for manufacturing the optical system.SOLUTION: An 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; and a third lens group G3 having positive refractive power. The third lens group G3 includes, in order from the object side, a third a lens group G3a and a third b lens group G3b. During focusing from an infinite object to a short-distance object, the second lens group G2 moves along an optical axis, the third b lens group G3b moves as a shift lens group so as to include a component in a direction orthogonal to the optical axis, and a predetermined conditional expression is satisfied.</p> |
