为使照片具有新意的视觉效果,使用长焦镜头不失为一种好办法。当镜头的焦距在200mm以上时,常常会出现意想不到的别致效果,但令人遗憾的是照片的素质也往往会有较大程度的下降,主要表现在影像的反差变低、清晰度变差以及色彩不饱和并易偏蓝色调。长焦镜头产生的这种不良现象在室外风光摄影时尤为明显。 其实,镜头本身并没有太多的过错,造成这种不良 In order to make photos with new visual effects, using the telephoto lens is a good idea. When the focal length of the lens is more than 200mm, the unexpected chic effect often appears. However, it is regrettable that the quality of the photo tends to decrease to a great extent mainly due to the low contrast and the poor sharpness of the image As well as the color is not saturated and easy to blues. This undesirable phenomenon caused by the telephoto lens is particularly noticeable in outdoor scenery photography. In fact, the lens itself does not have too much fault, causing such a bad