Patent ID: 7782551

Claim:
A wide-angle image pick-up lens system, comprising: a first lens group with negative refracting power and comprising a first lens, a second lens, and a third lens being aligned in order from an object side to an image side; the third lens being a bi-convex lens with positive refracting power and having a refractive index above 1.85, the first lens and the second lens being both meniscus-shaped lenses and having their convex surfaces facing the object side, the first lens and the second lens each having negative refracting power; and a second lens group with positive refracting power, the first lens group and the second lens group being aligned in order from an object side to an image side, the first lens group and the second lens group satisfying the following conditions: −0.15<f10/f12<−0.05, 0.3<f10/f14<0.8, wherein f10 is a focal length of the system, f12 is an effective focal length of the first lens group, and f14 is an effective focal length of the second lens group.