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    为什么说减光镜的滤光作用是非选择性的?
    2018/5/7 15:58:00

    在人像摄影中,灰镜经常用于大光圈镜头在烈日情景下。拍出绸缎的流水,我们就需要用慢快门,快门在白天我们很难慢下来,所以我们可以借助减光镜。但是有很多摄友,在拍摄出来的照片,可以看出来,并不是买了减光镜就可以拍出照片的。

    In portrait photography, grey mirrors are often used for large aperture lenses under the scorching sun. We need to use slow shutter for shutting down the flow of satin. Shutter is difficult to slow down in the daytime, so we can use the light reducing mirror. But there are many photographers who can see the pictures they take, and they can't take photos without buying a mirror.

    ND Fillter,俗称灰镜,减光镜,中密度减光镜等等,作用主要是减少光量进入相机,从而增加曝光时间。给摄影师更多的自由度去控制光圈,快门速度等等。

    ND Fillter, commonly known as gray mirror, light reducing mirror, medium density light reducing mirror and so on, is mainly used to reduce the amount of light into the camera, thereby increasing the exposure time. Give photographers more freedom to control the aperture, shutter speed and so on.

    减光镜可以帮助你的创作带来更多的曝光手段,让白天变黑夜,发挥创作空间;很多情况下,由于外界光线强度的关系,我们的无法得到足够长的快门时间,也就无法实现自己的摄影意图。

    高考摄影培训

    A light reducer can help your creation bring more exposure, make night and create space for creation; in many cases, because of the intensity of the outside light, we can not get enough shutter time, and we can not achieve their own photographic intentions.

    在野外进行水流拍摄的时候,我们希望用1秒钟的快门来让水流呈现出棉絮状的柔软质感。但是由于光线强烈,即使用相机的最小光圈和最低ISO拍摄,快门速度依然在1/30秒左右。

    When shooting the water in the field, we want to use the shutter for 1 seconds to make the water flow out of a cotton like soft texture. However, because of the strong light, that is, using the minimum aperture and minimum ISO of the camera, shutter speed is still about 1/30 seconds.

    这个时候唯一的办法就是用一块甚至两块ND8镜片来减弱进入镜头的光线。

    The only way to do that is to use one or even two ND8 lenses to reduce the light entering the lens.

    有一个简单的公式,假设你的相机在没有添加减光镜的情况下,正常曝光的快门速度是T,则加上减光镜后,在同样的光线条件、光圈大小和ISO下,正常曝光的快门速度=T*X,这个X就是减光镜片后面标注的那个数字,ND4的话X=4,ND8的话X=8。由于工艺的原因,ND后面的系数越是大,其对色温的影响就越大。

    There is a simple formula, assuming that when your camera does not add a light reducer, the shutter speed of the normal exposure is T, then the light condition, the size of the aperture and the ISO, the shutter speed of =T*X under the same light condition, the aperture size and the ISO, which is the number of the rear surface labeled with the light reduction lens, X=4, ND8 in ND4. X=8. Due to technological reasons, the greater the coefficient behind ND, the greater the impact on color temperature.

    对各种不同波长的光线的减少能力是同等的,均匀的;也就是说,减光镜对原物体的颜色不会产生任何影响,也能真实再现景物的反差(实质上由于工艺的原因,色温还是会产生少量的偏差)。

    The effect of the light filter is non selective, and the ability to reduce the light of various wavelengths is equal and uniform; that is to say, the light reduction mirror does not have any effect on the color of the original object, and can actually reproduce the contrast of the scene (in essence, because of the process, the color temperature will produce a small amount of deviation).

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    The company serves customers in an all-round way and works together with customers to develop together with quality, reasonable price and perfect after-sales service. Quality assurance, welcome to consult the negotiation.