There are some ingenious people out there. We like this snazzy little gizmo.
It's very lo-fi but clearly very adaptable to a variety of different lenses. Something worth investigating. You've got to love the simplicity but brilliance of the engineering, even if its made out of lego! The bottles seen aren't the most exciting things to rack focus between, maybe if they'd been filled with beer, it might have whet my appetite a bit more! Still they illustrate the point perfectly.
Well done havok2, whoever you are