Zoom optical system, optical apparatus, and method for manufacturing zoom optical system

Abstract

A zoom optical system exhibiting favorable optical performance while achieving weight and size reduction, an optical apparatus, and a method for manufacturing the zoom optical system are provided. A zoom optical system ZL included in an optical apparatus such as a camera 1 includes, sequentially from an object side, a first lens group G1 having positive refractive power, a second lens group G2 having negative refractive power, a middle lens group GM including one or two lens groups and having overall positive refractive power, a focusing lens group GF having negative refractive power and configured to move in an optical axis direction at focusing, and a final lens group GR having positive refractive power, a space between adjacent lens groups changes at zooming, the first lens group G1 is constituted by one single lens, and the zoom optical system ZL satisfies a condition expressed by a predetermined conditional expression.

Dependencies are inferred from the claim text.