The present disclosure provides a camera lens which has good optical properties, is ultra-thin, and includes five lenses having a bright F-number of less than 2.05. The camera lens includes, 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 negative refractive power, a fourth lens having a positive refractive power and a fifth lens having a negative refractive power. The camera lens satisfies specified relational expressions.
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 negative refractive power; and
a fourth lens having a positive refractive power and a fifth lens having a negative refractive power,
wherein the camera lens satisfies the following relational expressions (1) to (5):
−7.00< f 3/ f − 3.50 (1),
0.80 f 4/ f 0.90 (2),
−0.80 f 5/ f 0.60 (3),
−4.00 f 2/ f 1 −2.90 (4),
−2.00 ( R 1+ R 2)/( R 1− R 2) −1.20 (5), and
wherein
f denotes an overall focal length of the camera lens,
f1 denotes a focal length of the first lens,
f2 denotes a focal length of the second lens,
f3 denotes a focal length of the third lens,
f4 denotes a focal length of the fourth lens,
f5 denotes a focal length of the fifth lens,
R 1 denotes a curvature radius of an object side surface of the first lens,
R 2 denotes a curvature radius of an image side surface of the first lens, and
d 7 denotes a center thickness of the fourth lens.
2. The camera lens according to claim 1 , wherein:
the camera lens satisfies the following relational expression (6):
0.18 d 7/ f 0.30 (6).
3. The camera lens according to claim 1 , wherein:
the camera lens satisfies the following relational expression (7):
0.75 f 1/ f 0.85 (7).