Wenderoth Lind & Ponack, L.L.P.
Zoom lens system, imaging apparatus and camera
A zoom lens system is an optical system that includes, in order from an object side to an image side, a first lens group having one first lens element with positive optical power, a second lens group having one second lens element with negative optical power, a third lens group with negative optical power, and a subsequent lens group including at least two lens groups. When zooming, distances between the lens groups change, and condition: 1.65<|f2|/fw<2.20 (where f2: Focal length of the second lens group, and fw: Focal length of the entire system at a wide-angle end) is satisfied.
Panasonic Intellectual Property Management Co., Ltd.
G G G
G02B G02B G02B
inventional inventional inventional
Yasuto Genki
Suzuki Nakazawa