I appreciate that my posting here on the Canon M3 Depth of Field Scale, using CHDK, will be of limited value to most/all readers.
However, for the record, I thought it worth flagging up the power that all camera manufacturers refuse to give us. Namely, in-camera scripting technology.
The latest short post on my developments can be found here: https://photography.grayheron.net/2022/08/qdfs-further-refinement.html
This latest tweak means that the focus reporting, like a broken clock, is right in two locations, eg minimum focus and, say, the hyperfocal or another reference distance of interest.