Patent ID: 7599125
Filing Date: 2009-10-06
Classification: G02B

Abstract:
1. An image pickup apparatus having a wide angle zoom lens system, comprising: a zoom lens system; and an image pickup element which is disposed at an image side of the zoom lens system, and which changes an image formed by the zoom lens system, to an electric signal, wherein the zoom lens system consists of, in order from an object side thereof a first lens unit having a positive refracting power, a second lens unit having a negative refracting power, a third lens unit having a positive refracting power, a fourth lens unit having a positive refracting power, and an aperture stop which is disposed between the second lens unit and the third lens unit, and zooming is carried out from a wide angle end to a telephoto end by fixing a position of the first lens unit, and changing a distance between the lens units by moving at least the second lens unit and the third lens unit, and in a state at the telephoto end, with respect to a state at the wide angle end, the second lens unit is positioned at the image side, the third lens unit is positioned at the object side, a distance between the second lens unit and the aperture stop is narrowed, and a distance between the aperture stop and the third lens unit is narrowed, and the first lens unit consists in order from the object side thereof a front lens component having a negative refracting power, a reflecting optical member having a reflecting surface which reflects an optical path, and a rear lens component having a positive refracting power, and the zoom lens system satisfies the following conditional expressions where, f IH f