EXTENSION tube macro ring

You lookin' at my eye ?.. ( cannibal the musical reference ) 

Matches that I still have from The Viking Lounge in Juneau Alaska ( Happy Days )

Just had an hour or so Play with a Extension tube macro ring . After initially nearly having a heart attack thinking I had ruined a decent lens by clamping this on I was relieved when I managed to suss it out and have a go with it . I will be experimenting and will give a bit of a review soon .......