Patent ID: 6898023
Filing Date: 2005-05-24
Classification: G02B

Abstract:
1. A zoom lens comprising: a first lens group having a negative refractive power as a whole, a second lens group having a negative refractive power as a whole, and a third lens group having a positive refractive power as a whole, arranged in said order from object side to image side, for zooming from a wide-angle end to a telephoto end by moving said third lens group from an image plane side to an object side as well as for correcting image plane changes required in accordance with said zooming by moving said second lens group; wherein said first lens group consists of a lens having a negative refractive power and a prism for changing a light path arranged in said order from the object side, said second lens group consists of a lens having a negative refractive power; and an aperture stop is provided between said second lens group and said third lens group.