Botanic Gardens Close-Up

Still trying to get the hang of the Kenko extension tubes I got last week...

With the 70-200 f/4

Very nice. The 2nd is my favorite, but all are good.

AMAZING CLOSE UP MAN WOW I LIKE THEM ALL

Very nice, Mark. I especially like no. 2 and 3. In the "for what it's worth" category, when I first started playing around with extension tubes (and especially when I moved up to the MP-E 65mm), I discovered that I was very much underestimating how razor-thin the DOF is when shooting macro, so I began stopping down the aperture a lot and even working with focus stacking in order to get the whole flower in focus but not getting focus on the background. Then again, you may not have wanted the entire flowers in focus. Just offering some advice from my trials and errors, since you say you're still getting used to extension tubes.