Patent ID: 6525885
Filing Date: 2003-02-25
Classification: G02B

Abstract:
A zoom lens comprising a first lens group having a positive focal length, a second lens group having a negative focal length, an aperture stop member, a third lens group having a positive focal length, disposed in the stated order from the side of an object, wherein:said first lens group comprises a negative meniscus 1-1 lens having a convex surface directed toward the object, a positive meniscus 1-2 lens having a convex surface having a large curvature directed toward the object and joined with said 1-1 lens, and a positive meniscus 1-3 lens having a convex surface directed toward the object, disposed in the stated order from the side of the object; and a reflection preventing part is formed on a surface at which said 1-1 lens and said 1-2 lens are joined.