ZOOM LENS SYSTEM

摘要

A zoom lens system is provided to correct a shaking phenomenon of an upper part due to the shaking of a hand by moving a third lens to a direction at right angles to an optical axis. One or more reflection optical member refracts an incident light. A first lens group(G1) has a positive refractive power. A second lens group(G2) has a negative refractive power. A third lens group(G3) has the positive refractive power. A fourth lens group(G4) has the positive refractive power. The first lens group and the third lens group are fixed when a wide angle part is magnified to a telephoto part. The second lens group moves from the object to the upper surface. The fourth lens group moves from the upper surface to the object linearly.