I've used the same Depth of Field calculator app for some years, but recently noticed that it didn't calculate the correct DoF when adding a TC. At least, it didn't do what I expected it to do.
I'm only testing the apps for computing the correct DoF both with and without a TC (ie: also adjust for f-stop change when adding a TC).
I using a single datapoint to test (with and without TC=2x): FL=300mm, f/2.8, distance=180m.
The correct answer is a a dof=62.79m without a 2x TC, and dof=30,66m with the TC.
In hope that's useful to other forum members, here's my list of The Good, The Bad and The Ugly of DoF calculators for Android:
Feel free to add comments about these or other DoF apps you are using.
I'm only testing the apps for computing the correct DoF both with and without a TC (ie: also adjust for f-stop change when adding a TC).
I using a single datapoint to test (with and without TC=2x): FL=300mm, f/2.8, distance=180m.
The correct answer is a a dof=62.79m without a 2x TC, and dof=30,66m with the TC.
In hope that's useful to other forum members, here's my list of The Good, The Bad and The Ugly of DoF calculators for Android:
The Good | |
DOF Calculator | Correct computes the DoF. UI is a bit kludgy |
The Bad | |
DOF and Hyperfocal Calculator | Doesn't include the TC factor in the f-stop (only FL is multiplied) |
JDoF Calc | Doesn't include the TC factor in the f-stop (only FL is multiplied) |
The Ugly | |
HyperFocal Pro | Doesn't support TCs |
DoF | Doesn't support meters. No obvious way to set focus distance. Focal length and f-stop scale work opposite of each other |
DOF Expert | Doesn't calculate DoF, but estimates background blur. Ancient release (2013) |
Feel free to add comments about these or other DoF apps you are using.