Shot with my OLYMPUS E-M10MarkIV, a macro ring, and a 25mm f1.8. Six exposures, stacked with https://github.com/PetteriAimonen/focus-stack
Yeah at f/1.8 six images is still shallow dof. You should shoot at something in the f/7-11 range for more depth of field. I've used that same software and it can leave quite a few artifacts.