Patent ID: 6771430
Filing Date: 2004-08-03
Classification: G02B

Abstract:
A zoom lens system comprising, in order from an object along an optical axis;a first lens group having negative refractive power; and a second lens group having positive refractive power; a fixed stop being arranged between the first lens group and the second lens group; a distance between the first lens group and the second lens group decreasing when the state of lens group positions varies from a wide-angle end state to a telephoto end state; when the state of lens group positions varies from the wide-angle end state to a certain intermediate focal length state, a distance between the first lens group and the fixed stop decreasing as the fixed stop is moved with the second lens group in a body; and when the state of lens group positions varies from the certain intermediate focal length state to the telephoto end state, a distance between the second lens group and the fixed stop decreasing as the fixed stop as moved with the first lens group in a body.