Patent ID: 9207430
Filing Date: 2015-12-08
Classification: G02B

Abstract:
1. An image-forming lens comprising: from an object side to an image side in order, a first lens group with a positive refractive power; an aperture; and a second lens group with a positive refractive power, wherein the first lens group includes: from the object side in order, a first F lens group with a negative refractive power; and a first R lens group with a positive refractive power, wherein a focal length of the first F lens group: f wherein, in a case of focusing on an object in a near distance which is on a nearer side than an object at infinity from a state of focusing on the object at infinity, the first lens group and the second lens group are moved to the object side in different amounts of movement from each other, and wherein an interval between the first lens group and the second lens group in a state of focusing on the object at infinity: A