Photographing lens and electronic device

An electronic device comprising:

• a photographing lens;
• and
• an imaging element that receives an optical image formed by the photographing lens and converts the optical image into an electrical image signal,
• wherein the photographing lens comprises, sequentially from an object side to an image side,
• a first lens having a positive power and a object side lens surface that is convex toward the object side,
• a second lens having a negative refractive power and an image side lens surface that is convex toward the image side,
• a meniscus third lens having a positive refractive power and an image side lens surface that is concave toward the image side,
• a meniscus fourth lens having a positive refractive power and an image side lens surface that is convex toward the image side, and
• a fifth lens having a negative refractive power and an image side lens surface that is concave toward the image side around an optical axis, and
• wherein the photographing lens satisfies the following expressions:
• −3.0<(r21+r22)/(r21−r22)<−1.0, and
• −10.0<(r31+r32)/(r31−r32)<−1.5,
• where, “r21” denotes a paraxial radius of curvature of the object side lens surface of the second lens, “r22” denotes a paraxial radius of curvature of the image side lens surface of the second lens, “r31” denotes a paraxial radius of curvature of the object side lens surface of the third lens, and “r32” denotes a paraxial radius of curvature of the image side lens surface of the third lens.