Patent ID: 8238035
Filing Date: 2012-08-07
Classification: G02B

Abstract:
1. A zoom lens comprising, in order from an object side to an image side: a first lens unit having a positive refracting power; a second lens unit having a negative refracting power; a third lens unit having a negative refracting power; a fourth lens unit having a positive refracting power; and a fifth lens unit having a positive refracting power, wherein during zooming from the wide angle end to the telephoto end, the first lens unit, the second lens unit, the third lens unit, and the fourth lens unit move in such a way that they are each located closer to the object side at the telephoto end than at the wide angle end, a distance between the first lens unit and the second lens unit is larger at the telephoto end than at the wide angle end, a distance between the second lens unit and the third lens unit is larger at the telephoto end than at the wide angle end, a distance between the third lens unit and the fourth lens unit is smaller at the telephoto end than at the wide angle end, and a distance between the fourth lens unit and the fifth lens unit is changed for the zooming, and the zoom lens satisfies the following conditions: where f