US Patent 11187880 Zoom lens, image pickup optical device, and digital apparatus

A zoom lens includes, in order from an object side: a first lens group having positive refractive power; a second lens group having negative refractive power; a third lens group; a fourth lens group having positive refractive power; a fifth lens group having negative refractive power; and a sixth lens group having positive refractive power, wherein, during zooming, an interval between adjacent two lens groups varies among the first lens group, the second lens group, the third lens group, the fourth lens group, the fifth lens group, and the sixth lens group, the sixth lens group includes at least one negative lens, and the following Conditional Expression (1) is satisfied:0<ft/fl≤0.42  (1)where ft represents a focal length of an entire system at a tele end, and fl represents a focal length of the first lens group.