Viltrox DG-L Macro Extension Tube Ring

The rings are secure even with a large lens.

These are just what the doctor ordered. Yes I'm happy with my purchase! They are a perfect fit to my Panasonic Lumix S1R! Leica lens. No slop in the fit. Perfect electronic contacts insure that every function between my camera and lens work flawlessly. I'll be doing a lot of my future with these guys!

Just a heads up. The box that the tubes came in were mis labeled. The outside label stated “Canon type L extension tubes” But the content instructions were correctly labeled Extension tubes for LeIca, Panasonic, Sigma L mount”
You might want to correct this issue.

Viltrox L-mount Macro Extension Tube Ring Match with Panasonic Leica Sigma L-mount Cameras

This macro extension tube works pretty good with lmount lenses. You can dive in to macro world with any of the lenses without macro function. I'm Happy with my purchase.