According to the theory of optical compensated zoom, author designed optical compensated step zoom lenses.
根据光学补偿变焦距理论，作者设计出光学补偿式步进变焦物镜。
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。
If your subject is smaller than a car, take a step or two closer before taking the picture and zoom in on your subject.
如果拍摄对象比汽车小，则在拍摄照片前向前移一两步，然后拉近拍摄对象。
This is the magnifying glass icon with the minus sign on it and provides the ability to step-wise zoom out.
这是一个放大镜图标，上面有一个减号，提供逐步缩小的能力。
In the step of theory research, we studied the image zoom methods closely relating to output effect of video wall controller.
在理论研究阶段，我们对与电视墙控制器输出效果紧密相关的图像放大算法进行了研究。
Zoom system Cam design is an important step of the later stage design of a zoom system. The quality of the curve design is directly related with the stability of the final image surface of the system.
变焦系统凸轮曲线设计是变焦系统后期设计过程中十分重要的一环，曲线设计的好坏直接关系到系统最后像面的稳定程度。
Zoom system CAM design is an important step of the later-stage design of a zoom system. The quality of the curve design is directly related with the stability of the final image surface of the system.
变焦系统凸轮曲线设计是变焦系统后期设计过程中十分重要的环节，曲线设计的好坏直接关系到系统像面的稳定程度。
Zoom system CAM design is an important step of the later-stage design of a zoom system. The quality of the curve design is directly related with the stability of the final image surface of the system.
变焦系统凸轮曲线设计是变焦系统后期设计过程中十分重要的环节，曲线设计的好坏直接关系到系统像面的稳定程度。
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