A very nice looking capture. Love the natural colors. But, just as a suggestion you might try an edit program like Picasa. This would be a perfect choice to learn on. Flowers in nature always have spots for various reasons. You can't avoid them. You'll never find that perfect flower. Picasa would be a perfect platform to begin to learn editing. You could edit out that spot on the top right pedal. Just click the retouch (it is labeled as "retouch") button in Picasa and play with it. You will figure it out. I did. And, I am but a failed novice. So you, the artist can, too.