Patent ID: 7864441

Claim:
A zoom lens comprising a plurality of lens units so that spacings between the lens units are properly changed and thereby a magnification of the zoom lens is changed, wherein a most object-side lens unit comprises, in order from an object side, a negative lens, a reflecting member for changing an optical path, and a positive lens, without cementing the reflecting member and the positive lens as well as the reflecting member and the negative lens, and at least one of surfaces of the negative lens and the positive lens is configured as an aspherical surface to satisfy the following condition: 0.0001 <|Y 49 |/ih w <0.1 where Y 49 is an aspherical amount of the aspherical surface at a position where a chief ray of light incident on the most object-side lens unit at an angle of 49Â° with an optical axis is incident on a most object-side aspherical surface in the lens unit and ih w is an image height at a wide-angle position.