景深与镜头的选择

Depth of field and select of camera lens

讨论了不同焦距的两个镜头对同一物体拍摄出等大像的条件,找到了该条件下两幅图像的景深差别,为在摄影中正确运用景深理论提供了依据。

This paper discusses the conditions of taking same-size photos to the same object in two lenses of different focal length, finds the difference of depth field of two images on these conditions, and provides basis for proper applying depth of field in photography.