This is a striking photo of the yellow flower. I have a heck of a time getting the focus right on close-up's; so I obviously think you did a splendid job. At first I thought you should consider cropping out some of the background, but I decided that you have it just right.
This is a beautiful photo ! I too have a difficult time getting the focus on extreme closeups and I can tell your camera may have had a little challenge here also. But the colors are striking. Thank you.
Roger