Patent ID: 7239455

Claim:
A telephoto lens comprising, in order from an object side of the telephoto lens: a first lens group having a positive refracting power; a second lens group having a negative refracting power; and a third lens group comprising an aperture diaphragm, wherein the first lens group comprises: a first positive lens having a meniscus shape and having a convex surface on the object side thereof; a negative lens arranged on an image side of the first positive lens, the negative lens having a concave surface on the image side thereof; and a second positive lens arranged on the image side of the negative lens, the second positive lens having a convex surface on the object side thereof, and the first lens group satisfies Condition Equations: 35<ν11<50 (1) ν12<45 (2) 75<ν13 (3) ν12<ν11 (4) wherein ν 11 represents an Abbe number of the first positive lens in the first lens group; ν 12 represents an Abbe number of the negative lens in the first lens group; and ν 13 represents an Abbe number of the second positive lens in the first lens group.