P档下的闪光灯
P档下的闪光灯
The overriding principle of Program (P) mode in flash photography is that the camera tries to set a high shutter speed so that you can hold your camera by hand and not rely on a tripod. If that means the background is dark, so be it.
P挡下使用闪光灯的优先原则是相机设定尽可能高的快门速度使得你可以手持拍照,而不用三角架。这意味着照片的背景是暗的。
Program mode operates in one of two modes, depending on the ambient (existing) light levels.
在这种模式下,根据环境光的强度,相机选择下面的一种操作:
1) If ambient light levels are fairly bright (above 13 EV) then P mode assumes you want to fill-flash your foreground subject. It meters for ambient light and uses flash, usually at a low-power setting, to fill in the foreground.
如果环境光非常强(13EV以上),P档假定你是进行补光,然后测量环境光并使用闪光灯补光,通常闪光灯的输出设定很小。
2) If ambient light levels are not bright (below 10 EV) then P mode assumes that you want to illuminate the foreground subject with the flash. It sets a shutter speed between 1/60 sec and the fastest X-sync speed (see above) your camera can attain. The aperture is determined by the camera’s built-in program.
如果环境光不是非常强(10EV以下),P档假设你是要用闪光灯照亮被摄主体。相机设定快门速度在1/60秒和最快同步速度之间。光圈是由相机的内建程序设定的。
Because the camera tries to keep the shutter speed at a reasonable speed for handholding the camera you will end up with dark or black backgrounds if you take a flash photo in P mode when ambient light levels are not bright.
当你使用P档,环境光又不够强,而相机为了手持还要使用合理的快门速度,结果是照片的背景很暗或者全黑。
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