I don't remember where but I came across a link recently that I found interesting. It was Advanced Tips for tack sharp images. I read the article and naturally had to go out and play. I don't know if my images were any better or not but I had fun. My camera doesn't appear to be set up the same way as the one used in the article so I just winged it and set out to see what I would get.
On that particular day I chose my white iris as my subject
Good thing I did my experiment when I did because these guys are now all shriveled up and done for the year.