Depending on the lens' focal length, the image will deform and affect how the image looks in photos.
根据镜头焦距的不同,图像会随之变形并且会影响最终的照片效果。
The reason for this is that as we know, longer focal length lenses magnify the image, but they also magnify the camera shake.
正如我们前面所学,更长的镜头焦距虽然放大了图像,但同样增加了镜头抖动。
Using a longer focal length and photographing stars far from the north star increase the distance stars will move across the image.
使用长焦镜头拍摄远离北极星的星星,会增加星星在相片上移动轨迹。
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