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    半级光圈可用来进行曝光和补光
    2018/5/24 14:49:47

    在大多数情况下,被摄者都与背景拉开一定的距离。由于光源的照明随着距离的增加而明显地减弱,而背景比被摄者距离光源更远,所以背景的亮度要比被摄者暗许多。

    In most cases, the photographers draw a certain distance from the background. As the illumination of the light is obviously weakened with the increase of distance, the background is much farther away from the light source than the subject, so the background brightness is much darker than the subject.

    如果按被摄者的照明情况曝光的话,则背景就会显得更暗了,结果是被摄者看起来如同融入黑暗的背景之中。如果摄影师不介意这种背景效果的话,当然也就用不着背景光了。

    If exposed to the illuminated condition of the subject, the background will appear darker. The result is that the photographers seem to blend into the dark background. If the photographer doesn't mind the background effect, of course, there is no need for background lighting.

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    但是如果要想把被摄者同背景区别开来的话,则有必要对背景进行单独照明,于是就有了所谓的背景光。补光,也叫辅助光,顾名思义,它所起的作用就是对阴影进行补充照明,使阴影变得浅淡。其实,补光所用的可以是与主光同样的柔光灯箱,通过照明距离或输出功率来调整它与主光的光比。

    But if we want to distinguish the photographers from the background, it is necessary to illuminate the background individually, so we have the so-called background light. Supplementary light, also known as auxiliary light, as its name implies, its role is to add illumination to the shadow, making the shadow lighter. In fact, the use of light can be the same as the main light soft light box, through the distance or output power to adjust its light ratio with the main light.

    如果补光的曝光比主光少3挡光圈的话,其光比就是1:3,也就是说其结果将得到较深的阴影。如果补光的强度接近主光的话,比方说相差半级光圈的话,那么阴影部分就变得非常浅淡了。

    If the exposure of the fill light is less than the 3 stop aperture of the main light, the light ratio is 1:3, that is to say, the result will get a deeper shadow. If the intensity of the light is close to that of the main light, for example, if the difference is half a circle, the shadow will become very shallow.

    为了简便起见,补光的光源可以固定在天花板或墙上,只是通过调整输出功率的方式来控制阴影的深浅。

    For simplicity, the light source can be fixed on the ceiling or wall, but only by adjusting the output power to control the depth of the shadow.

    本文的精彩内容来自山东艺考摄影培训详细内容请点击我们的官方网站:http://www.dysypx.com/谢谢您的到来!

    The highlights of this article are from the Shandong art examination photography training program. Please click on our official website: http://www.dysypx.com/ thank you for coming.

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