Patent ID: 8421904

Claim:
A lens apparatus comprising: an aperture stop forming an aperture; a first lens disposed on a first side further than the aperture stop in a direction of an optical axis of the lens apparatus, the first side being one of an object side and an image side; and a second lens disposed on a second side further than the aperture stop in the direction of the optical axis, the second side being the other of the object side and the image side, wherein, in zooming or focusing, the aperture stop is moved independently of the first and second lenses in the direction of the optical axis, and the first lens and the aperture stop are brought into a first state where an aperture stop side lens surface of the first lens is located away from the aperture stop on the first side and a second state where at least part of the aperture stop side lens surface of the first lens protrudes through the aperture to the second side further than the aperture stop.