WIDE ANGLE LENS SYSTEM FOR VIDEO-PHONE

摘要

In the optical instrument, a stop is provided between a first lens and a second lens, the first lens satisfying the relation of -0.7×(the total power of lenses)<(the power of the first lens)<-0.4×(the total power of lenses) and the second lens satisfying the relation of -0.7×(the total power of lenses)<(the power of the second lens)<-1.4×(the total power of lenses) by reducing the radius of curvature on the right of the first lens and increasing the absolute value of the negative power.