PURPOSE: To easily obtain a prescribed back-focus, to make the lowering of a peripheral light quantity small, and to reduce the pincushion distortion aberration even when an anamorphic lens is mounted at a wide viewing angle by setting the lens constitution so as to satisfy a specified condition.

CONSTITUTION: The retro-focus type lens LFL has a first group L1 of a negative refractive power, a diaphragm SP and a second group L2 of a positive refractive power in order from a first conjugate point having a longer distance, and when the focal distance of the whole system is represented by (f), the focal distance of the ith group by fi, the air gap between the first group L1 and the second group L2 by DL12, and a distance from the final lens surface of the second group L2 at the time of the smallest image forming magnification on the side of the first conjugate point to a second conjugate point having a shorter distance is represented by bf, the conditions shown by; 1.4<bf/f, 0.65<-f1/f2<0.8, 0.05<DL12/f<0.1 are satisfied. A screen S is arranged on the side of the first conjugate point having a longer distance and a projection plane F is arranged on the side of the second conjugate point having a shorter distance.