Patent ID: 7283309

Claim:
A zoom lens system for forming a final image of an object, said system having an object side and an image side and forming a first intermediate real image between the object and the final image, said system comprising in order from the object side to the image side: a first zoom group including at least two lens elements and located between the object and the first intermediate real image, said first zoom group comprising at least a first zoom subgroup and a second zoom subgroup which are movable along an optical axis to change a magnification of the first intermediate real image; a second zoom group including at least two lens elements and located between the first intermediate real image and the final image, said second zoom group comprising at least a third zoom subgroup and a fourth zoom subgroup which are movable along the optical axis to change the magnification of the final image; and a first lens group on the object side of the first zoom group having negative power, the first lens group for producing a maximum field of view of greater than about 85 degrees; wherein the zoom lens system has a zoom ratio of less than 10 to 1; and wherein the first lens group and the first zoom group having a zoom ratio of about 2:1.