I upgrade form a Canon Rebel XT to a 40D, and let me tell you that there is a pretty good learning curve. I was a little disappointed at the beginning, because I could not get the camera to focus just as easily as my XT. However, I bought a Canon EOS Digital Photography Guide and read for a while, and then read all the tips and hints at one of the Canon photography forums, and finally things clicked on. I took a whole bunch of photos like these two today, and I was pleasantly surprised. All I did was to watch the focus points to make sure they were spot-on the subject, while ignoring the rest of the frame. Also, I paid close attention to the WB, and switched it accordingly.
Use a Sigma 70-300mm set to macro on the flower, and a little lens that I rally like, a Tamron 17-50mm f/2.8 on "Abbie."
Rose after petals fell