Patent ID: 7529036

Claim:
A projection zoom lens comprises in order from a magnification side: a first lens group having a negative refractive power; a second lens group having a positive refractive power; and a third lens group for an aberration correction, wherein: all the first to third lens groups are configured to be moving groups, respectively, the second lens group and the third lens group are configured to move to the magnification side during varying of a power of the zoom lens from a wide-angle end to a telephoto end, and the first to third lens groups satisfy: | M 3 /f 3|<| M 1 /f 1|<| M 2 /f 2| (1) 0.40 <|M 2 /f 2|<0.80 (2) where Mi denotes a movement amount of the i-th lens group between the wide-angle end and the telephoto end during the varying of the power, and fi denotes a focal length of the i-th lens group.