I decided to test out my new Nikon D600 with some macro photography.  I don't have an actual macro lens so instead I use Kenko extension tubes.  For these shots I stacked the 36mm and 20mm and shot with my Sigma 70-200 F2.8.  This was my first time to use the 70-200 for macros.  I love it!  Firs the zoom lets me shoot macro without being right on top of the subject which is quite nice.  Also, the D600 allows me to shoot a high ISO to speed up the shutter so I don't get motion blur without much noise.