Hello, I have a problem when taking pictures of a person. Some parts of the body and jewelry show up blurry. I do use a tripod when I take pictures, so I don't think I shake the camera. Considering that finger rings show up blurry as well. I don't think the person moves either. In the picture I took below. The model's hands and right leg are blurry. What should I do to correct this problem? I use the Cannon, Rebel 450D. Thank you for all your help!