Compact telephoto lens having materials with anomalous relative partial dispersion

A lens (1) for a camera (40) is described, said lens having a longitudinal axis (2), a focal length (f), an installation length (TL) in the direction of the longitudinal axis (2) of less than 10 millimeters (TL < 10 mm), a number of refractive optical elements (11-17) and a stop with a maximum diameter (D), with the focal length (f) of the lens (1) ranging between 25 millimeters and 6 millimeters (25 mm ≥ f ≥ 6 mm) and the ratio of focal length (f) to maximum diameter of the stop (D) ranging between 1.4 and 8 (1.4 ≤ f/D ≤ 8). There is at least one refractive optical element (4, 7) which comprises material with an Abbe number [nu]d and for which the absolute value of the difference [Delta]Pg,F = |Pg,F - Pg,Fnormal| between relative partial dispersion Pg,F of the material and a normal relative partial dispersion Pg,Fnormal at the Abbe number [nu]d of the material is at least 0.05. Here, the normal relative partial dispersion Pg,Fnormal is defined by Pg,Fnormal([nu]d) = 0.6438 - 0.001682[nu]d.