Tiny Tuesday Focus Stacking

This is a rather hurried attempt at in-camera focus stacking.

Not sure how the results compare with the software method described by hobbs which I haven't tried yet but it must be quicker and easier being totally automatic. 
However I don't think many cameras have the functionality yet.

I nearly forgot to mention it's a bit of debris, including the end of an acorn, on the corrugated iron roof of our woodshed. 
You can see the curve of the iron on the left.