The camera adjusts its focus, lens aperture, and shutter speed by itself.
照相机会自己调整焦距、光圈和光闸速度。
rear-controlled zoom lens
背面调整变焦距透镜
He took out the binoculars and adjusted the focus.
他取出双筒望远镜并调整了焦距。
Development of precise light beam steering and focusing equipments
精密光路偏转及焦距调整机构的发展
To adjust or come to a focus.
使聚焦调整或达到焦点
In taking a picture, the shutter,the focal length and the other things must be adjusted as the case may be.
在拍照过程中，快门、焦距等等必须按实际情况加以调整。
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。
The image is out of focus.
这影像的焦距没调好。
Don't forget to focus the lens.
别忘了调节镜头的焦距。
focusing glass [ screen ]
【摄】调焦距用的毛玻璃
Always readjust your focus to the infrared focusing mark when using infrared films and infrared.
当您使用红外线胶卷和红外线滤光器时,请您必须经常调整您的焦距至红外线对焦标记。
Focus your camera (on those trees).
把照相机的焦距调准（把焦点集中在树上）.
Study of Automatic Focusing Technique for Long Focus Oblique Real-Time Aerial Camera;
长焦距斜视实时航空相机自动调焦技术的研究
Compatibility adjustment of pushing cars used in the 5th and 6th coke ovens
5~#、6~#焦炉推焦车互换性调整
You must focus your camera before you try to take a picture .
拍照以前你必须调节照相机的焦距。
(physiology) the automatic adjustment in focal length of the lens of the eye.
（生理学）用眼的透镜来自动调节焦距。
The field glasses adjust with a screw.
双筒望远镜是用一个旋钮调节焦距的。
His eyes were so tired that he had difficulty focusing them.
他的眼睛累了,调节焦距困难。