Patent ID: 8130452

Claim:
An electronic image pickup apparatus comprising: a zoom lens system; and an image pickup device which is disposed on an image side of the zoom lens system and which converts an image formed by the zoom lens system into an electric signal, wherein the zoom lens system comprises, in order from an object side, a first lens unit having a negative refractive power, a second lens unit having a positive refractive power, a third lens unit having a negative refractive power, and a fourth lens unit having a positive refractive power, the first lens unit comprising, in order from the object side, a negative lens and a reflective optical element which reflects an optical path, during zooming from a wide-angle end to a telephoto end, each space between the lens units which are adjacent with each other being changed, the first lens unit being arranged in a fixed position to the image pickup device, and at least the second lens unit and the third lens unit being moved, wherein the reflective optical element is a prism having a reflective surface, and wherein said second lens unit includes a bi-convex lens element and a cemented lens component disposed on the image side of the bi-convex lens element, the cemented lens component including a positive lens element and a negative lens element, and wherein the third lens unit comprises a single lens component having a negative refractive power.