获得为远方的主题可能的最大的闪光范围，他在最大的孔上或附近和在高的光敏性，ISO 400或者更很少800射击。
To obtain the greatest flash range possible for far-off subjects, he shoots at or near maximum aperture and at a high light sensitivity, either ISO 400 or more rarely 800.
扩大了的摄像头孔，避免了闪光灯反射光的不良效果。
Expand the camera aperture, avoid the bad effect of light flash.
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