Patent ID: 8437090
Filing Date: 2013-05-07
Classification: G02B

Abstract:
1. A zoom lens comprising: a first lens unit having a positive refractive power; a second lens unit having a negative refractive power; a third lens unit having a positive refractive power; a fourth lens unit having a negative refractive power; and a fifth lens unit having a positive refractive power, wherein the first, second, third, fourth, and fifth lens units are arranged in order from an object side to an image side, wherein a distance between the first lens unit and the second lens unit is longer at a telephoto end than at a wide angle end, a distance between the second lens unit and the third lens unit is shorter at the telephoto end than at the wide angle end, a distance between the third lens unit and the fourth lens unit differs between the telephoto end and the wide angle end, and a distance between the fourth lens unit and the fifth lens unit is longer at the telephoto end than at the wide angle end, and wherein the following conditional expressions are satisfied: where f wherein the moving amount M