Patent ID: 8780454

Claim:
A wide angle lens system comprising: a first lens group having a negative refractive power and a second lens group having a positive refractive power arranged from an object side, wherein the first lens group comprises a first lens of a meniscus shape having a convex surface toward the object side, a second lens having a concave surface toward the object side, and a third lens having a convex surface toward the object side, and the second lens group comprises a fourth lens having a convex surface toward the object side, a fifth lens having a concave surface toward the object side, and a sixth lens of a meniscus shape having a concave surface toward the object side, and the wide angle lens system satisfies the following expression, 0.60 ≦f all /D all ≦1.00, where f all denotes an effective focal length of the wide angle lens system, and D all denotes a distance from a vertex of the surface of the first lens facing the object side to a vertex of a surface of the sixth lens facing an image side.