Lovely shot, WT! And noise is well controlled at ISO 1600. I am just not sure that I would have used such a small aperture and high ISO, because I wouldn't have minded blurring the background a bit more.
Ronny, I admire your ablity to use a 135mm, and you show me a 180mm shot! Getting this stability and composition from a 1,80m mfd is awesome. But, just this once, I will dare to say something. I see a purple/magenta trace on the white petals, which are not strictly white to my eye. Is that intentional, in order to keep the wonderfully warm tone?