Patent ID: 6747815
Filing Date: 2004-06-08
Classification: G02B

Abstract:
A retrofocus wide-angle lens formed of only two lens groups, in order from the object side, as follows:a first lens group of negative refractive power; a diaphragm; and a second lens group of positive refractive power; whereinsaid first lens group includes, in order from the object side, an object-side lens group, a first light-receiving lens group, and a second light-receiving lens group; said object-side lens group includes, in order from the object side, a plurality of negative lens components and a positive meniscus lens component with its convex surface on the image side; said first light-receiving lens group includes an initial negative lens group that includes a negative lens component that is at the object side of said first light-receiving lens group; and said second light-receiving lens group includes a negative lens element and a positive lens element.