App description

Online photography depth of field calculator

<img src="http://drr.ikcest.org/static/upload/5d/5db23a20-eb32-11e9-bccc-00163e0618d6_m.jpg" />

<img src="http://drr.ikcest.org/static/upload/6b/6b8c93ca-eb32-11e9-a437-00163e0618d6_m.jpg" />

Formula for calculating depth of field：

<img src="http://drr.ikcest.org/static/upload/7a/7ada11cc-eb32-11e9-a437-00163e0618d6_m.jpg" />

Among them:

δ——Allowable Dispersion Circle Diameter

F——The Aperture Value of the Lens

f——Focal length

L——Focus distance

ΔL1——Front Depth of Field

ΔL2——Background depth

ΔL——Depth of field

Formula：

Front Depth of Field\(ΔL1=FδL^2/（f^2+FδL）\)

Background depth\(ΔL2=FδL^2/（f^2-FδL）\)

Depth of field\(ΔL=ΔL1+ΔL2=（2f^2FδL^2）/（f^4-F^2δ^2L^2）\)