Patent ID: 8526117
Filing Date: 2013-09-03
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 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 second lens unit and the third lens unit move so that the distance between the first lens unit and the second lens unit is increased and the distance between the second lens unit and the third lens unit is decreased at the time of zooming from a wide-angle end to a telephoto end, the first lens unit and the fourth lens unit are fixed for the zooming, and when M2 is the amount of movement of the second lens unit at the time of the zooming from the wide-angle end to the telephoto end, and M3 is the amount of movement of the third lens unit at the time of zooming from the wide-angle end to the telephoto end, the conditional expression; is satisfied.