Zoom lens and imaging apparatus

An imaging apparatus comprising:

• a zoom lens that includes, in order from the object side, a first lens group which has a positive refractive power, a second lens group which has a negative refractive power, and a third lens group which has a positive refractive power;
• and
• an imaging device that converts an optical image, which is formed by the zoom lens, into an electrical signal,
• wherein the zoom lens performs zooming 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
• −0.45<fGF/fGR<−0.10, (1)
• where
• fGF is a focal length of the positive lens group, and
• fGR is a focal length of the negative lens group.