I have done this for two reasons. First, I've refined my use of output-based focusing, eg knowing the infinity blurs; and second, I've now ported these ideas from my EOS Magic Lantern cameras (5D3 and various EOSMs) , over to my CHDK Powershot cameras (G1X, G7X, G5X and S95).
My approach is to use my Depth of Field Information (DOFI) scripts to constantly tell me:
- The optical, defocus blur at infinity in microns;
- The diffraction blur through the scene in microns;
- The total blur at infinity in microns;
- An estimate of how many focus brackets will be required to seamlessly focus stack from the current position to the hyperfocal;
- Where I am relative to the hyperfocal
- Whether the current position has a positive or negative overlap with the last image captured.
More information on the CHDK version of DOFI, called DOFIC, may be found here: https://chdk.fandom.com/wiki/Depth_Of_Field_Info_-_Chdk_version
The third member of the DOFI family is called DOFIZ, which adds exposure bracketing control to DOFIC. More information on DOFIZ may be found here: https://chdk.fandom.com/wiki/DOFIZ:_DOFIC_with_Exposure_Bracketing
The latest version of the scripts will always be available from the script download list on the right.
Bottom line: for those that want optimum focus, you likely will not do better than using either DOFI or DOFIC; and for the lucky Powershot photographers, DOFIZ gives you full control over your exposure bracketing, including as you are focus stacking.
As usual, I welcome feedback on the DOFI scripts.