An optical lens system is disclosed. The optical lens system includes a first lens that has negative refractive power, a second lens that has positive refractive power, a third lens that has positive refractive power, a fourth lens that has refractive power, a fifth lens that has positive refractive power, a sixth lens that has negative refractive power, an aperture located between the second lens and the third lens, and conditional expressions of “−1.4