High-resolution and large-zoom-ratio optical system and zoom lens using same

The invention relates to an optical system with high resolution and large zoom ratio. The system comprises an objective lens group, a zoom group, a compensation group and a rear group which are sequentially arranged along an optical axis, the objective lens group is sequentially provided with a biconcave lens, a biconvex lens, a biconvex lens and a positive meniscus lens along the optical axis; the positive zoom group is sequentially provided with a negative meniscus lens, a biconcave lens and a first gluing group in sealed connection with a positive meniscus lens along the optical axis; the compensation group is sequentially provided with a biconvex lens, a negative meniscus lens, a second gluing group which is tightly connected with the biconvex lens, and a biconvex lens along the optical axis; and the rear group is sequentially provided with a fixed diaphragm, a third glued lens group formed by tightly connecting a biconcave lens and a positive meniscus lens, and a fourth glued lens formed by tightly conne