Patent ID: 6552857
Filing Date: 2003-04-22
Classification: G02B

Abstract:
A soft-focus lens system comprising a positive master lens group and a negative soft-focus lens group,wherein said master lens group comprises two sub lens groups F1 and F2, and a diaphragm is provided therebetween; wherein at least one of said sub lens groups F1 and F2 of said master lens group is made moveable along the optical axis in order to set a normal photographing mode or a soft-focus photographing mode in which larger field curvature is occurred than in said normal photographing mode; wherein said negative soft-focus lens group comprises a positive sub lens group and a negative sub lens group, which are independently moveable with respect to said master lens group; wherein said positive sub lens group and said negative sub lens group are moved to set said normal photographing mode or said soft-focus photographing mode in which larger spherical aberration is occurred than in said normal photographing mode.