Projection lens system with high resolution and compact size

摘要

A projection lens system includes, in order from the magnified side to the reduced side thereof, a first lens group with negative refractive power, and a second lens group with a positive refracting power. The first lens group includes a first lens having a negative refracting power. The projection lens system satisfies the following condition: 4.5<|F1|/F<6; wherein F1 is the effective focal length of the first lens; F is the effective focal length of the projection lens system.