high ratio zoom lens 高倍率变焦距镜头
The zoom lens is high performance and large in zoom ratio and is compact due to the simple structure.
该变焦 透镜具有高性能和大变焦率，并且因其简单的结构而显得很紧凑。
Firstly, the zoom ratio may be enlarged. Secondly, the image point movement may be easily eliminated. The principle of optical compensated step zoom lens is explained.
这种变焦距物镜有两个优点，一是可以实现高倍率变焦，二是容易消除在变焦过程中产生的像点移动现象。
应用推荐