Zoom lens and imaging apparatus

摘要

A zoom lens comprises, in order from the object side: a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; and a third lens group that has a positive refractive power. Zooming is performed by changing spaces between the first to third lens groups during zooming from a wide-angle end to a telephoto end. The third lens group includes, in order from the object side, a positive lens group, having a positive refractive power, and a negative lens group, disposed to be close to the image side thereof and having a negative refractive power, with an air gap, which is widest in the third lens group, interposed therebetween. The third lens group satisfies the condition −0.45

主权项

1. A zoom lens comprising, in order from the object side:
a first lens group that has a positive refractive power; a second lens group that has a negative refractive power; and a third lens group that has a positive refractive power, wherein zooming is performed by changing spaces between the first to third lens groups during zooming from a wide-angle end to a telephoto end, wherein the third lens group includes, in order from the object side, a positive lens group, which has a positive refractive power, and a negative lens group, which is disposed to be close to the image side thereof and has a negative refractive power, with an air gap, which is widest in the third lens group, interposed therebetween, wherein the negative lens group includes a cemented lens which has a negative refractive power and which is formed of, in order from the object side, a positive lens and a negative lens, and a second positive lens, and wherein the following Conditional Expression (1) is satisfied
−0.45fGF is a focal length of the positive lens group, andfGR is a focal length of the negative lens group.