Photography Toolbox
Calculations | Photography Toolbox
Calculation methods used in photography-toolbox
This site documents the methods used to calculate results in
photography-toolbox
.
Exposure
\( EV = \log_2{fstop ^ 2 \over t} - \log_2{ISO \over 100}\)
where \( t\) is the shutter speed
Flash exposure
\(GN = {distance * fstop * \sqrt{100 \over ISO}}\)
Circle of Confusion
Currently (as of v0.2.2), the Circle of Confusion is calculated as \(d/1500\), where \(d\) is the diagonal of the selected sensor. This may change in later versions! There might be the option to choose your calculation method later as well.
Hyperfocal distance
\( d_{hyperfocal} = {{f ^ 2} \over {fstop * CoC}} \)
Depth of Field
\(near = {{d_{hyperfocal} * distance} \over {d_{hyperfocal} + (distance - f) }} \)
\(far = {{d_{hyperfocal} * distance} \over {d_{hyperfocal} - (distance - f) }} \)
\(dof = far - near \)