This paper discribes the miniaturization of zoom lens with long focal length and big zooming ratio

discusses the advantages of reducing focal length in zoom and compensation units and increasing the distance between the focus adjustment unit and zoom unit.It also discusses the possiblity of aberration correction using simple structure

for realizing the miniaturiza- tion of the zoom lens with high-quality image and simple struc- ture

followed by two examples given in the paper.