I am traveling to Germany end of this month, and from what I hear, it is a place to shoot architectures. I will mostly be in the city (Frankfurt, Berlin, and Dresden). My question is which one is the ideal lens to rent. I am using Canon 30D, and I was thinking 70-200mm f2.8. Is this the right lens or should I get wide angle lens. Since I am rookie, any advice is appreciated. Thank you.