Another minor, but useful, tweak to the non M3 version of the script, that provides an estimate of the number of focus brackets that will be taken.
The script will pause to show the number of brackets, thus allowing you to terminate the script, with a full shutter press, if the number is too high, or to run the script with a half shutter press.
A large number of brackets may occur if you are, say, using the Min2Inf option and/or you are using an overlap less than the CHDK CoC. That is the full focus range or your camera has a small minimum focus.
I’ve updated the info in the Scripts area, where the latest version may be accessed.
Have tested the script on my S95, G7X, G5X and G1X.