(EN) The present invention has, from the object side, a first lens group (G1) having negative refractive power, a second lens group (G2) having positive refractive power, a third lens group (G3) having negative refractive power, a fourth lens group (G4) having positive refractive power, a fifth lens group (G5) having negative refractive power, and a sixth lens (G6) group having positive refractive power, the air gap between mutually adjacent lens groups (G1 to G6) being varied during variable power to satisfy a predetermined conditional expression. The present invention thereby provides a variable-power optical system provided with excellent optical performance, an optical device, and a method for manufacturing a variable-power optical system.
(ZH) 本发明从物体侧依次具备具有负的光焦度的第1透镜组G1、具有正的光焦度的第2透镜组G2、具有负的光焦度的第3透镜组G3、具有正的光焦度的第4透镜组G4、具有负的光焦度的第5透镜组G5以及具有正的光焦度的第6透镜组G6,在进行变倍时,相邻的透镜组G1~G6彼此之间的空气间隔变化,且满足预定的条件式。由此,提供具备良好的光学性能的变倍光学系统、光学装置、变倍光学系统的制造方法。