Patent ID: 8810917

Claim:
A zoom lens comprising, in order from the object side to the image side: a first lens unit having a negative refractive power; a second lens unit having a positive refractive power; and a third lens unit comprising a lens, wherein the distance between the first lens unit and the second lens unit is smaller at the telephoto end than at the wide angle end, the distance between the second lens unit and the third lens unit changes during zooming from the wide angle end to the telephoto end, the first lens unit consists, in order from the object side, of a front sub lens unit having a negative refractive power, an optical path bending member, and a rear sub lens unit having a positive refractive power, the front sub lens unit comprises a biconcave single lens, the rear sub lens unit comprises a positive single lens and a negative single lens, the total number of lenses in the front sub lens unit is one, the total number of lenses in the rear sub lens unit is two, and the biconcave single lens in the front sub lens unit satisfies conditional expression (5′): −1<( r 1FNO +r 1FNI )/( r 1FNO −r 1FNI )<0.7 (5′), where r 1FNO is the paraxial radius of curvature of the object side surface of the biconcave single lens in the front sub lens unit, and r 1FNI is the paraxial radius of curvature of the image side surface of the biconcave single lens in the front sub lens unit.