An optical or lens system for use with an imaging system of a vehicle includes a plurality of optical elements. The optical elements include less than five optical elements and, preferably, include four optical elements. Each of the optical elements is formed of a plastic material. At least two of the optical elements include a diffractive element. Preferably, a diffractive element is formed on an outer surface of two of the optical elements. The optical system provides and focuses a field of view of a targeted area of at least approximately 100 degrees to an imaging plane. The imaging plane is at an imaging sensor or camera or other imaging device operable to receive the image from the optical system. The optical system further includes an aperture stop between two of the optical elements.