Patent ID: 7663816
Filing Date: 2010-02-16
Classification: G02B

Abstract:
1. A wide-angle lens comprising, in order from an object: a first lens group having positive refractive power; and a second lens group having positive refractive power; the second lens group including, in order from the object, a 2A lens component having positive refractive power and movable for focusing on the object, a 2B lens component having negative refractive power and movable for focusing on the object, a 2C lens component having positive refractive power and movable for focusing on the object, and a 2D lens component having positive refractive power and movable for focusing on the object, and the following conditional expression being satisfied: where f 23 denotes a focal length of the 2C lens component, and f 24 denotes a focal length of the 2D lens component.