Camera lens

A camera lens, in sequence from an object side to an image side, comprising:

• a first lens having a negative refractive power, an object-side surface of the first lens being a convex surface;
• a second lens having a refractive power, an object-side surface and an image-side surface of the second lens both being concave surfaces;
• a third lens having a positive refractive power, an image-side surface of the third lens being a concave surface, and an object-side surface of the third lens being a spherical surface;
• a fourth lens having a refractive power;
• a fifth lens having a refractive power;
• a sixth lens having a refractive power;
• and
• a seventh lens having a refractive power, an object-side surface and an image-side surface of the seventh lens each being an aspheric surface,
• wherein the camera lens satisfies a conditional expression:
• −2<f1/f<−1.4,in which, f1 denotes an effective focal length of the first lens and f denotes an effective focal length of the camera lens.