1.
manual zoom lens
(镜头)手控可变焦距透镜
2.
One of Visible Video Zoom System Research;
一种可见光变焦距电视光学系统研究
3.
variable focal length (cylindrical) lens
变焦(距)(圆柱)透镜
4.
autofocus zoom lens
自动聚焦变焦距镜头
5.
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快速变焦距手术显微镜
6.
rear-controlled zoom lens
背面调整变焦距透镜
7.
best image plane of zoom lens
变焦距物镜的最佳像面
8.
image plane displacement of zoom lens
变焦距物镜像面位移
9.
auto iris zoom lens
自动光圈变焦距镜头
10.
zoom stereomicroscope
快速变焦距立体显微镜
11.
Performance Analysis of the Elliptic Beam Ring-focus Antenna with a Variable Focal Distance
椭圆波束变焦距环焦天线的性能分析
12.
The wearer of such glasses could change the focus by sliding a switch along one arm of the frame.
带这种眼镜的人通过调整一只眼镜腿上的滑动开关可以改变焦距。
13.
macro teleconverter
增距式微距附加镜﹝使标准镜头变成微距而保留最近封焦距离﹞
14.
variable interval schedule
可变时距程序可变时距程序
15.
universal zoom operation microscope
通用型变焦距手术显微镜
16.
The focal length differs with the thickness of the lens
焦距长底随透镜的厚度而变化。
17.
Having three focal lengths.
三焦距的有三个焦距的
18.
equivalent focal length
当量焦距，等效焦距