Simple and Functional, Good Build Quality, Great Value for Money compared to a real macro lens
Simple and to the point - these Extension Tubes do the trick without costing too much.
The build quality is good and they are quite light. You can use them individually, or together for Extreme Close Ups.
NOTE: you have to be VERY VERY close to the subject for Auto Focus to work. Basically, as soon as you put these on, you lose the ability to focus to infinity, and can only focus on very close objects.
With that in mind, Auto Focusing works on both Full Frame and APSC Sony cameras. I have tried it with my a6000 and a7rIII.