Limited depth of field

As humans we are used to an almost unlimited depth of field - most of what we can see is in focus.  One result of that is we do not pay attention to details unless forced to; many of my photos show detail that most people never have seen before since they never really looked.
Using a limited depth of field (DOF) assists in seeing and isolating for others to see.  The photo below is an example of that.  The intricacies of the stamens as they unfold, the texture of the petals, their color, and so on, is primarily available because a) they are in focus and b) there is nothing to distract us from them.  The DOF is small enough that everything else is blurred.
The lens used is a 50mm, f/1.8.

Clematis floating in a sea of black.