These flowers are tiny, about 5m.m dia.
But the NX30 and 18-55m.m kit lens had no problem in gettibg focus. This has to be one of, if not THE best lit lenses available today. I know it's better than my Samsung GX kit lenses, (these were in fact manufactured by Pentax, not Samsung, as the GX10 is a clone of the Pentax K10).
Have a good day.