Compact photographic camera lens system having a short overall length

A compact photographic camera lens system having a short overall length comprising a first positive meniscus lens component having a convex surface on the object side, a second biconcave lens component, a third biconvex lens component and a fourth negative meniscus lens component, said lens system being so designed as to satisfy the following conditions and said fourth lens component having aspherical surfaces on both the sides defined by the following formula (7):

• ##EQU2## wherein the reference symbol f represents focal length of the entire lens system as a whole, the reference symbol f.sub.123 designates focal length of the lens group consisting of said first through third lens components as a whole, the reference symbol f.sub.4 denotes focal length of said fourth lens component, the reference symbol d.sub.2 represents airspace reserved between said first and second lens components, the reference symbol d.sub.5 designates thickness of said third lens component, the reference symbols n.sub.1 and n.sub.4 denote refractive indices of said first and fourth lens components, the reference symbol .nu..sub.3 represents Abbe's number of said third lens component, and the reference symbols Ai, Bi, Ci and Di designate constants within the ranges defined as follows:
• A.sub.7 >-10f.sup.-3, B.sub.7 >-10.sup.3 f.sup.-5, C.sub.7 >-10.sup.3 f.sup.-7, D.sub.7 >-10.sup.4 f.sup.-9 ;
• A.sub.8 <-10.sup.-1 f.sup.-3, B.sub.8 <10f.sup.-5, C.sub.8 <-10.sup.2 f.sup.-7, D.sub.8 <-10.sup.2 f-9.