I`m finally planning another trip. We usually go every year but this year we built a new house and that depleted our finances so we couldn`t swing a trip. We are going back the second week in Dec. 2014. I`ve been thinking about my photographic experiences from the last trip and the changes I want to make for the next trip. The one thing I want is a better lens for dark rides. I have the 1.8 50mm but that was just to much zoom (using a Canon T3i body). I`ve been thinking that the Sigma 30 1.4 would do the trick. I`ve since run across the 18-35 1.8 Sigma. It`s twice the cost but gives you more options. Has anyone used this lens before?