I posted this in the lens section, but I think its appropriate here too
Wife and I will be going on a Mediterranean cruise in May for our 10 year anniversary, ports include Venice, Rome, and Athens among others. I can only afford to buy one lens for the trip and I'm trying to decide between a 15-85 or the 10-22 (or the sigma equivalent). I like the range the 15-85 will give me and not having to change lenses in the middle of a tour is a huge bonus. However, I'm worried that it may not be wide enough (want to capture the coliseum, vatican, and Trevi fountain and other architecture). Anyone thats been to europe I would love some advice. If I get the 10-22 I would probably take along my kit and maybe the 50 1.8. What do you guys think.