Hi, I have a new Canon 50D. It came with a 75-300mm lens without image stabilization. I feel like I might benefit from upgrading to the lens with IS. I've used the current lens both indoor & outdoor (swim meets). Outdoor most pics are turning out nicely - indoors, I have a higher percentage out of focus. Would the IS help me with this. At this point I am solely using the various preset modes, I have not begun to play with modifying settings. My dad thought that if I increased shutter speed then the current lens would probably be as good as the IS lens in most situations. His understanding is that IS is more of a benefit in the video world. Any help/suggestions would be much appreciated.