Have you really looked at a sunflower closeup?  Looks like stars or starfish around a scoop of beluga caviar. I used an extension tube, not my 105mm macro lens. The extension tubes are cheap and allow you to get in really close. They attach between your normal lens and the camera body. Kenko extension tubes come in a set of three and are available at B & H Photo where I buy most of my photo gear.  Excellent customer service.  Click on image for larger view. This image can be purchased as a print or downloadable file at Dawn2dawn Photography