Focus stacking is a technique used widely by close-up specialists because it overcomes one of the key difficulties of close-up and macro photography – depth of field. The closer you get to your subject, the shallower the depth of field, to the point where you can’t get the full depth of your subject sharp, even using the lens’s minimum aperture.
The solution is to take a whole series of shots at slightly different focus points and then merge them in software to combine the
