Just a backyard weed

This little flower is of a quite hard to eradicate weed, growing between the vedgies in my backyard. However it has very pretty flowers like many wild growing plants have.
Taken with my K5 and again with my home made Printing Ektar f4.5 125mm . This lens has no diaphragm and is always used wide open.
I like its softness without being unsharp.