The present invention is directed to a photographing lens containing, in order
from an object side: a first lens having a positive refractive power and a convex
surface facing the object side; a second lens having a negative refractive power;
a third lens having a positive refractive power; and a fourth lens having a negative
refractive power and at least one aspheric surface, the photographing lens satisfying
the following conditional expressions:
##EQU1##
where LT denotes the distance on the optical axis between the object
side of the first lens and the image side of the fourth lens; f denotes the total
focal length of the photographing lens; and f3 denotes the focal length
of the third lens.
