gianluigi said:
The depth of field is so short that a lot of pictures have to be taken with a small change in the manual focus and then to be fused.
Looks nice, you should really use Magic Lantern Focus Stacking to automate this, and personally for shots like this @f8 (lens peak sharpness) and for 100% crop I have to take 10-20 stacked shots to assemble it w/o out of focus segments.