英语高手进来帮我翻译篇文章啊~！有关电影的，谢谢~！！5555

The Variable Shutter
On cameras equipped with a variable shutter,the shutter angle can be narrowed to change shutter speed. Some bariable shutters may be shut dowm continuously, while others can only be shut down to certain angles.
Narrowing the angle reduces shutter speed. A 90'shutter ,for example ,gives a shutter spee of about1/100 at 24FPS (using the above formula for shutter speed).Closing the shutter reduces the exposure, allowing high-speed film to be used outdoors or allowing the lens to be opened to decrease depth of field or shooting at a selected f-stop.
A variable shutter that can be closed down while the camera is running allows exposure changes in the middle of a shot .For example,when the camera moves from a sunlit to a shaded area within a shot ,it is often necessary to change exposure. The iris diaphragm of the lens can be changed,but this would change the depth of field and may be more noticeable than shutting down the variable shutter .If the variable shutter can be shut down continuously to 0 degree with the camera running, in-camera fades and dissolves can be created.
Strobing ro Skipping
Decreasing the shutter angle makes the exposure for each frame shorter and freezes motion more effectively.The increased sharpness of each frame is advantageous for making still enlargemets from movie frames and for motion analysis but often causes unwanted effects in the moving image .Strobing or skipping may occur when there is any camera or subject movement .If the movement is too fast,the eye is not able to integrate successive frames and the image seems to skip rather than move continuously,causing the viewer eye strain .Skipping most often appears in pans,especially pans across strong vertical lines .The higher the image contrast or greater the image sharpness,the more likely that strobing will occur.Fast shutter speeds also increase the likelihood of strobing. In general,it is safer not to close down the shutter for exposure control if there is any camera or subject movement.
A phenomenon related to strobing,and frequently referred to by the same term ,is often noticed when the wheels of a moving vehicle on the screen seem to be stopped or to be traveling in reverse.This occurs when the intermittent exposures happen to catch spokes at the same position in consecutive frames (thus,the wheels seem stopped)or catch them in a position that causes the wheels to appear to be spinning in reverse.
On cameras with a variable shutter ,always check that the shutter is open before every day's shooting .if someone else has used the camera, the shutter opening may have been narrowed .some cameras have devices to warn you that the shutter has been closed on others,like the Éclair NPR,you must rotate the turret to check the position of the shutter.

要自己翻译的哦
比较多一点
就剩50多了
比较长 辛苦了
最近我会努力赚点分 然后追加的
谢谢
补充一下~！！不要软件翻译的哦`！！！

=1=

The Variable Shutter
On cameras equipped with a variable shutter,the shutter angle can be narrowed to change shutter speed. Some bariable shutters may be shut dowm continuously, while others can only be shut down to certain angles.

可变的快门
在相机上装有可变快门，快门角度可以弄窄以改变快门速度。一些可变快门可以任意角度的关闭，但其他的只能在某一定角度关闭。

Narrowing the angle reduces shutter speed. A 90'shutter ,for example ,gives a shutter spee of about1/100 at 24FPS (using the above formula for shutter speed).Closing the shutter reduces the exposure, allowing high-speed film to be used outdoors or allowing the lens to be opened to decrease depth of field or shooting at a selected f-stop.

把角度变小会把快门的速度减慢。一个90度的快门，例如，速度会达到大约1/100 ，在24贞的速度下，（利用上面提到的快门速度公式）。关掉快门会减少曝光，这样可以用与户外高速摄影或用于打开镜头减少景深或用于有选择的设(f-stop??).

A variable shutter that can be closed down while the camera is running allows exposure changes in the middle of a shot .For example,when the camera moves from a sunlit to a shaded area within a shot ,it is often necessary to change exposure. The iris diaphragm of the lens can be changed,but this would change the depth of field and may be more noticeable than shutting down the variable shutter .If the variable shutter can be shut down continuously to 0 degree with the camera running, in-camera fades and dissolves can be created.

可变快门可以在拍摄的时候关掉，以改变曝光大小。例如，一次摄像中当相机把镜头从阳光充足的地方移动到阴暗的地方时，必然需要改变曝光大小，镜头的可变光圈可以改变，但可能会影响景深，回比你关闭可变快门影响效果更大。如果相机在运行时可变快门可以在零角度关闭，相机内退色，和溶解可以被重建。

Strobing ro Skipping
Decreasing the shutter angle makes the exposure for each frame shorter and freezes motion more effectively.The increased sharpness of each frame is advantageous for making still enlargemets from movie frames and for motion analysis but often causes unwanted effects in the moving image .Strobing or skipping may occur when there is any camera or subject movement .If the movement is too fast,the eye is not able to integrate successive frames and the image seems to skip rather than move continuously,causing the viewer eye strain .Skipping most often appears in pans,especially pans across strong vertical lines .The higher the image contrast or greater the image sharpness,the more likely that strobing will occur.Fast shutter speeds also increase the likelihood of strobing. In general,it is safer not to close down the shutter for exposure control if there is any camera or subject movement.

选通和略过
减小快门角度可以使每一贞的曝光时间减小，使得移动画面转为静止看起来更有效。每一贞的锐度增加了，对静止放大图像和移动分析有好处但也常常会出现不好的图像效果。当镜头移动或目标事物移动时会引发选通和略过。如果移动的过快，人眼会看到不连续的画面，会另观众眼睛疲劳。略过通常会出现在拍摄移动全景画面中，尤其是画面里有明显的垂直竖条状的东西出现时。画面的对比度越大，图像的锐度越高，选通出现的几率越高。很高的快门速度也会引起选通。总结：如果没有镜头或目标事物的移动，关掉快门的曝光控制会安全一些。

A phenomenon related to strobing,and frequently referred to by the same term ,is often noticed when the wheels of a moving vehicle on the screen seem to be stopped or to be traveling in reverse.This occurs when the intermittent exposures happen to catch spokes at the same position in consecutive frames (thus,the wheels seem stopped)or catch them in a position that causes the wheels to appear to be spinning in reverse.
一个根选通有关的现象，常常提到的，就是注意到汽车的轮子在汽车移动时看起来转的是反方向的或是不动的。这个现象出现在中度曝光设置，不同的贞抓拍到的轮子花纹位置一样或偏后，所以看起来不动或反向的。

On cameras with a variable shutter ,always check that the shutter is open before every day's shooting .if someone else has used the camera, the shutter opening may have been narrowed .some cameras have devices to warn you that the shutter has been closed on others,like the Éclair NPR,you must rotate the turret to check the position of the shutter.

使用带有可变快门的相机，在使用前检查一下快门是否开启。如果别人用过你的相机，快门的开启角度可能会变窄，一些相机的快门关闭时有警报装置会提醒你，像Éclair NPR这款，你必须旋转他来检查快门的位置。

很多专业名词没搞懂，如果你是这个专业的，自己研究一下
turret Strobing Skipping

FYI，just make friends.

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