Lens system

An lens system comprising a first lens and a second lens arranged in turn from an object side to an image side, whereby, the first lens includes a first surface facing toward the object side and a second surface facing toward the image side, the second lens includes a third surface facing toward the object side and a fourth surface facing toward the image side, the first, second, third and fourth surface are all aspherical, and the lens system satisfies the following conditions:

• 0.08≦D2/D≦0.14
• 4≦h2/z2≦12
• wherein,
• D2 is the distance along an optical axis of the lens system from the second surface of the first lens to the third surface of the second lens,
• D is the distance along the optical axis of the lens system from the first surface of the first lens to the fourth surface of the second lens,
• h2 is the distance from the optical axis of the lens system to the outermost optically effective portion of the second lens surface of the first lens, and
• z2 is the distance along the optical axis of the lens system from the vertex of the second surface of the first lens to the point of the optical axis from where h2 is measured.