Any one have any tips for focus stacking. I am using my laptop to focus with the Canon EOS Utility. How many photo should I use for focus stacking? Lets say I am taking picture of the face of the watch on a flat surface. Would ten focus steps and six picture be enough? What have you used? It is taking so long to navigate in 10X zoom on the screen then focus on the watch face. The screen centering is so slow with the Canon EOS utility. Perhaps there is a better program with a faster work flow like Macro DSLR. Unfortunately it is IOS only any one know of a good tethering program for controlling the camera via your PC laptop?