Hi all! I got my extension tubes just before I went to Himos last week and decided to use them on this glass of beer. As you can see the tubes really help focus closer than without them. This is a 98% full frame photo, no other cropping than leveling the photo (it was tilting a wee bit). The biggest bubbles here are about 0.5mm in diameter.
Better viewed big.
Info: ISO100, f/5.6, 1/4sec
Hope you like it. Comments and critiques are welcomed.
Canon EF 100mm f/2.8 USM Macro + Kenko Extension Tubes