A visitor

Please comment

I'd possibly look at your composition, you've got a lot of space to the right that's not adding much to the image. Can you crop in a little closer to bring up the subject of the photo, which is the bee? Also, I might consider shooting this at at least f9 and maybe a faster shutter speed, to get the bee sharper. Finally, if you've got some good processing software such as photoshop or lightroom, you can recover some of the overexposed areas of the sunflower (not all - that one petal is totally blown out).