A five element lens system for use with an imaging sensor includes first, second, third, fourth, and fifth lens elements and an optical filter that are arranged sequentially in order from an object side to an imaging side. The lens elements are coated with an anti-reflective film. The lens system further includes an optical filter that is disposed at a distance from the imaging sensor. The lens elements are relatively positioned to each other to satisfy specific conditions. The lens elements further include thickness to diameters ratios that satisfy specific conditions. The lens system is capable of focusing images of objects located from a range of 10 cm to infinity from the lens system.