A camera lens includes, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power. The camera lens satisfies specific conditions.
1. A camera lens comprising, lined up from the object side to the image side, a first lens with positive refractive power, a second lens with negative refractive power, a third lens with positive refractive power, and a fourth lens with negative refractive power, wherein the camera lens satisfies the following conditions (1)-(3):
0.90≦ F 1/ F≦ 1.15 (1)
−2.50 ≦F 2/ F≦− 1.60 (2)
0.05≦( R 1+ R 2)/( R 1− R 2)≦0.30 (3)
1.50≦( R 3+ R 4)/( R 3− R 4)≦3.00 (4)
In which,
F: Overall focal distance of the lenses
F1: The focal distance of the first lens
F2: The focal distance of the second lens
R1: The object side curvature radius of the first lens
R2: The image side curvature radius of the first lens
R3: The object side curvature radius of the second lens
R4: The image side curvature radius of the second lens.
2. The camera lens according to claim 1 further satisfying the following condition (5):
0.60 ≦F 3/ F≦ 0.95 (5)
In which
F: Overall focal distance of the lenses
F3: The focal distance of the third lens.
3. The camera lens according to claim 1 further satisfying the following condition (6):
−2.50≦ F 4/ F≦− 1.00 (6)
In which
F: Overall focal distance of the lenses
F4: The focal distance of the fourth lens.