A projector lens system includes a negative first lens group and a positive second
lens group. The first lens group comprises a first lens element that is formed
as a negative meniscus lens element, a positive or negative second lens element,
a negative third lens element, a positive fourth lens element that is cemented
to or separated from the third lens element, and a negative fifth lens element.
The first lens group satisfies condition (1) with respect to the refractive power
thereof, and satisfies condition (2) with respect to the refractive power of the
negative first lens element of the negative first lens group:
- wherein
- fw: focal length of the entire projector lens system at the
wide-angle extremity;
- fI: the focal length of the negative first lens group; and
- f1,1: the focal length of the negative first lens element
of the negative first lens group.
