Hi Will, if you are shooting indoors i guess you would of needed to up the ISO on the camera this would allow to to have a faster shutter speed, as most indoor events have pretty poor light compared with outside. And it seems if your shots are blurry this is due to a low shutter speed i guess.
Also to help the autofocus, if you can on the D50 just use one focus point, as this speeds up the auto focus as it is calculating for one point rather than 4 or 5.
Hope this helps.
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Jonathan | Atomic-Carbon
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