Camera lens

1. A camera lens, comprising, from an object side to an image side: a first lens having a positive refractive power, a second lens having a negative refractive power, a third lens having a positive refractive power, a fourth lens having a positive refractive power and a fifth lens having a negative refractive power, the camera lens satisfying following relational expressions (1) to (4):

0.80≤ f 1/ f≤ 0.90  (1)

15.00≤ f 3/ f≤ 25.00  (2)

0.80≤( R 3+ R 4)/( R 3− R 4)≤1.50  (3)

−50.00≤( R 5+ R 6)/( R 5− R 6)≤−25.00  (4),

wherein

f denotes an overall focal length of the camera lens,

f 1 denotes a focal length of the first lens,

f 3 denotes a focal length of the third lens,

R 3 denotes a curvature radius of an object side surface of the second lens,

R 4 denotes a curvature radius of an image side surface of the second lens;

R 5 denotes a curvature radius of an object side surface of the third lens; and

R 6 denotes a curvature radius of an image side surface of the third lens.

2. The camera lens according to claim 1 , wherein:

the camera lens satisfies following relational expression (5):

−2.50≤ f 2/ f≤− 1.50  (5),

wherein

f 2 denotes a focal length of the second lens.

3. The camera lens according to claim 1 , wherein:

the camera lens satisfies following relational expression (6):

−2.00≤( R 1+ R 2)/( R 1− R 2)≤−1.20  (6),

wherein

R 1 denotes a curvature radius of an object side surface of the first lens, and

R 2 denotes a curvature radius of an image side surface of the first lens.