" I'll be visiting Disneyworld soon and am looking for suggestions for an alternative lens that might work better particularly for night shots"
Shooting under difficult low light level situations is more than just the lens. The R10 is not a top candidate for low light conditions itself. In my career I have had a couple jobs that took me to Disney World. The night shots are pretty fairly lighted so you may not have much of a problem.
EB
EOS 1D, EOS 1D MK IIn, EOS 1D MK III, EOS 1Ds MK III, EOS 1D MK IV and EOS 1DX and many lenses.
