The camera has two focuses.
这部相机有两个焦距.
More expensive cameras have adjustable focusing.
比较贵的照相机有可调焦距.
A typical lens has a focal length ( f ) of 625 mm.
常见镜头的焦距 ( f ) 为625毫米.
As a result, the focal lengths in these planes will be different.
结果, 这两个平面内的焦距将不同.
His eyes were so tired that he had difficulty focusing them.
他的眼睛累了,调节焦距困难.
He focused the camera and took a photo.
他对好焦距,照了一张相.
In camera, the lens must be focused on the object to be photographed.
照相机内的镜头必须对准要拍照的物体调节焦距.
The focal length of the camera lens plays an important role in photo criteria.
摄影机镜头的焦距在摄影规范中起着重要的作用.
This photograph looks funny; I think you forgot to focus the camera.
这张照片看上去有些滑稽, 我想你是忘了给照相机调焦距了.
The unsteadiness of air becomes prohibitive only if instruments with large focal length are used.
只有在使用长焦距的仪器时,才不允许空气的不稳定.
Only a bit out of focus.
只是焦距有点不对.
The focal spot diameters are hardly changed in communication wavelength band . 2.
焦距相同,光波长不同时,对于目前通常选用的通信用波段,聚焦后焦斑直径基本不变.
Figure 4. Relationship Between Focal Length, FOV, Sensor Size, and Working Distance.
图4. 焦距, 视野FOV, 感应器大小, 和工作距离间之关系.
The percentage depends on the conditions, shutter speed and focal length.
二者的比例取决于拍摄时的情况, 快门速度和焦距.
He racked his camera and pressed down the shutter release.
他将照相机的焦距调好,然后按下快门.