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如何计算景深
更新时间： 2020-11-01 00:00:00  

景深ΔL=ΔL1+ΔL2=(2f^2FδL^2)/(f^4-F^2δ^2L^2)。由景深计算公式可以看出,景深与镜头使用光圈、镜头焦距、拍摄距离以及对像质的要求(表现为对容许弥散圆的大小)有关。景深是指在摄影机镜头或其他成像器前沿能够取得清晰图像的成像所测定的被摄物体前后距离范围。光圈、镜头、及焦平面到拍摄物的距离是影响景深的重要因素。在聚焦完成后，焦点前后的范围内所呈现的清晰图像的距离，这一前一后的范围，便叫做景深。

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