Hi everyone, I'm thinking about (but haven't yet committed to) purchasing a wide angle lens for my NEX 6. What prompted this is that I have a business trip in Paris and, while I probably won't have more than about a day or so to play tourist and take some photos, it seemed as though a wide angle lens might come in handy. I also have the 16-50pz and 19mm Sigma, so maybe one of those would be sufficient, but I thought something wider might be helpful. With this in mind, I was looking at the 16mm with the adapter and the 10-18 f4. The latter is supposedly the better lens and is more versatile, but it is pricey and I'm not yet certain how much I would wind up using the lens, so I'm not sure if it is worth laying out that kind of money. In fact, I'm not sure if it makes sense even to spend the $300-$350 on the 16mm/converter combo. So I guess I am asking two questions: (1) As between the 10-18 and the 16mm with converter, which would you choose?; and (2) would you just scrap the idea of getting one of these lenses because what I already have should do the job? As always, thoughts are appreciated.