Lens barrel adjustment gives the approximate focus, which can then be fine tuned with camera movement. So I use both but it's the camera movement that does the final job.
For me it's usually hand held with flash, but for static subjects I'll sometimes use a tripod & focusing rail. The rail is pretty much essential for focus stacking (adjusting the lens changes the magnification).
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Mike
Pentax K5ii & Panasonic G5 user (with far too many bits to list)
Member of North Essex Photographic Workshop
Also online with PentaxUser.co.uk, Flickr, MU-43, MFLenses...
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