I recently visited Farlington Marshes (Portsmouth, southern England) to take some panning shots of the resident and over-wintering ducks and geese in flight. I'm not a twitcher (bird-watcher), but thought this would be good as a subject.
I wanted to test the results from using AI Servo and AI Focus on rapidly moving subjects flying towards and away from me and left to right, but I couldn't see any discernible difference between the two functions. I'll Flickr some shots when I get time to process the RAW's.
I should add that I tried high speed continuous shooting and single shots using the kit 55-250mm lens with Tv set to 500 and ISO 400 (it was an extremely overcast day with leaden skies).
Does anyone have any practical advice about which should have been the better option? I have read the manual and the excellent David Busch book for the 60D, but actual user input would be welcomed.