Lowest ISO possible, proper lighting, and remember that lenses as a rule of thumb are sharpest around 2-3 stops above the base aperture. So for a F/2.8 lens, it will usually be sharpest until F/5.6-F/8. That doesn’t mean it’s unusable above that, and sure if you’re working with still objects you can focus stack to keep sharpness but nothing will be sharp if it’s not in focus, so for most photography it’s sort of a balance of variables.
Lowest ISO possible, proper lighting, and remember that lenses as a rule of thumb are sharpest around 2-3 stops above the base aperture. So for a F/2.8 lens, it will usually be sharpest until F/5.6-F/8. That doesn’t mean it’s unusable above that, and sure if you’re working with still objects you can focus stack to keep sharpness but nothing will be sharp if it’s not in focus, so for most photography it’s sort of a balance of variables.