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    彩色摄影和黑白摄影对曝光要求差异
    2015/4/15 11:33:05
    彩色胶卷属于多层乳剂结构,受到各个感光乳剂层特性和染料性能的影响,曝光的宽容度小于黑白胶卷。其次,由于彩色胶卷有红、绿、蓝三个感光乳剂层,若曝光过度或不足,对每一乳剂层均会产生不同程度的影响,导致三原色的彩色影像失去平衡,色彩不能正确还原。此外,济南艺考摄影培训可以告诉大家的是:为纠正曝光失误,在制作彩色照片时不像黑白照片那样容易补救。彩色摄影对曝光的要求较黑白摄影更为严格。通常彩色负片的曝光误差不允许超过±1级;彩色反转片的曝光误差不允许超过±1/2级。说到这边,估计有摄友会问上海摄影学校,是不是自然光的色温偏低时,就一定要使用校色温滤光镜校正呢?自然光的色温偏低,拍出的彩色照片的色调偏红,甚至偏黄。一般情况下应用校色温滤光镜校正。但是,也有例外,要看拍摄者在什么环境下,要表达什么意境。
    Color film is affected by multiple emulsion, emulsion layer characteristics and properties of various dyes, the exposure latitude than black and white film. Secondly, because of the color film has red, green, blue three emulsion layers, if exposed to excessive or insufficient, will produce different effects on each emulsion layer, resulting in color image color balance, color can not be restored correctly. In addition, Ji'nan art photography training can tell you is: to correct the mistakes in the production of exposure, not the color photos of black and white photos as easy recovery. Requirements of color photography of exposure than black and white photography more stringent. Usually the exposure error of color negative film is not allowed to exceed the 1 level; exposure error color reversal film is not allowed to exceed 1/2. When it comes to here, is estimated to have taken you will ask the Shanghai School of photography is not the natural light, low temperature, it must use the school color correction filters? Low natural light color temperature, color photographs of the reddish color, and yellow. Application of correction color filter in general university. However, there are exceptions, to see what the photographer in the environment, to express what mood.
    黄昏时刻的景色往往是迷人的,海滩上尤为如此。海滩黄昏时的色温约为4000K,若用日光型彩色胶卷拍摄,显然光源色温偏低,照片偏黄红色。但是,为了强调环境气氛,烘托出黄昏景色,照片偏黄红色倒是很正常的。因此,没有必要使用校色温滤光镜校正。假如真的把色温校正了,拍出的彩色照片像在阳光下似的,与黄昏格格不入,无法表达意境。脚架取景拍摄时,眼睛也许根本不靠在取景器目镜上,这时内测光的误差很大,不容忽视,尤其是在此时再选用小光圈,从取景器目镜进入的光很有可能超过TTL的光,误差很大。济南艺考摄影培训:www.dysypx.com/
    Dusk scenery is charming, especially on the beach. The beach at the time of the color temperature is 4000K, if the shot with sunlight type color film, apparently the light source color temperature is low, the picture is yellow red. However, in order to emphasize the environmental atmosphere, foil at dusk, the picture is yellow red is very normal. Therefore, there is no need to use the school color correction filters. If the color temperature correction, color photo shoot like in the sun like, and evening be misfits, unable to express the artistic conception. The tripod to shoot, the eyes may not rely on the viewfinder eyepiece, the metering error is large, can not be ignored, especially the small aperture at the same time, entering from the viewfinder eyepiece optical is likely to exceed the TTL light, the error is large.