I haven't tried focus stacking yet, but I have of course seen
Doug Smith's great posts on this and the results he has achieved [on an unrelated point
his website appears to be down as at the time of posting - I
hope that 's temporary!].
I recently came across this short youtube tutorial on the process while searching for tips on coin photography and thought it might be of interest for those who have or are thinking about trying this technique.
https://www.youtube.com/watch?v=-_uIioCltVsOf course, there's
plenty of other focus stacking tutorials on youtube, but this one features a rather nice ancient coin...