I just purchased my first Canon L telephoto lens and wanted a chance to practice. Perfect opportunity came up this past weekend when a buddy of mine invited me to watch him at a club autoX. All shot with Canon L 100-400mm 4.5-5.6 USM IS attached to a Canon D30 body. Had a good time learning how to pan smoothly , time the shots, and work the lens. First set ever with this lens and I'm sure I'll get better with more practice.