A wide angle lens system, from an object side to an image plane side, includes: a first lens having a positive refractive power; a second lens having a positive refractive power and an exit surface that is convex toward the image plane side; a third lens having a negative refractive power and an exit surface that is concave toward the image plane side; a fourth lens having a positive refractive power and an exit surface that is convex toward the image plane side; a fifth lens having a negative refractive power and an exit surface that is concave toward the image plane side; and a sixth lens having a positive refractive power. The wide angle lens system satisfies the following formulas: 75