Nice photos. BTW, I also did bleeding hearts. I use manual lenses for macros and was having a tough time. Found out from the website luminous... that the D800 has a flaw with non-CPU lenses. Apparently, the minimun shutter speed sets at 1/30 using the auto-ISO mode.
I am having far mode issues getting used to DOF with short lenses in macro. Not a D800 problem, just a learning curve.