| 摘要 |
PROBLEM TO BE SOLVED: To obtain a compact zoom lens having a vibration-proof function which is constituted of five lens groups as a whole and by which as excellent image is obtained. SOLUTION: This zoom lens is provided with five lens groups, that is, a 1st group L1 having positive refractive power, a 2nd group L2 having negative refractive power, a 3rd group L3 having the positive refractive power and having the action of a variable apex angle prism correcting the blurring of a photographic image by changing the apex angle of the prism, a 4th group L4 having the positive refractive power and a 5th group L5 having the negative refractive power in the order from the object side. Then, in the case of performing variable power from a wide angle end to a telephoto end, the respective lens groups are moved so that an interval between the 1st and the 2nd groups L1 and L2 is increased, an interval between the 2nd and the 3rd groups L2 and L3 is increased and an interval between the 4th and the 5th groups L4 and L5 is decreased. |
