The design results prove that the zoom system has high optical transmission, large zoomratio, high resolution, small size and excellent image quality.
设计结果表明，该系统具有透过率高、变倍比大、分辨率高、体积小、像质高等优点。
2
Firstly, the zoomratio may be enlarged. Secondly, the image point movement may be easily eliminated. The principle of optical compensated step zoom lens is explained.