Zoom lens with distortion correction and projection optical apparatus using it

A zoom lens comprising:

• a lens group of negative refractive power that is positioned at the enlarging end of the zoom lens;
• and
• a lens group of positive refractive power that is positioned at the reducing end of the zoom lens;
• wherein
• both the lens groups are fixed during zooming;
• the lens group of negative refractive power includes two lens components of negative refractive power;
• one lens component of the two lens components is at the enlarging end of the zoom lens and includes a meniscus lens element of negative refractive power;
• the other lens component of the two lens components is adjacent the lens component at the enlarging end, and includes a biconcave lens component;
• at least one of the two lens groups includes a plastic lens element having a lens surface bonded to a glass lens element;
• the other lens surface of the plastic lens element has an aspheric shape;
• and
• the plastic lens element has an on-axis thickness that is less than one-quarter the on-axis thickness of the glass lens element to which it is bonded.