LENS SYSTEM HAVING A LARGE APERTURE AND CAPABLE OF CLOSEUP

摘要

PURPOSE: A lens system is provided to achieve miniaturization of a lens system in which three lens groups can be driven separately.;CONSTITUTION: A lens system comprises a first lens group(G1) having plus refraction power, a second lens group(G2) having plus refraction power, and a third lens group(G3) having plus or minus refraction power. The first lens group comprises four lenses or less. When the lens system carries out focusing, the first through third lens groups move separately.;COPYRIGHT KIPO 2010