So I'm thinking about getting an ultra-wide. I'm purely an amateur (i.e., I don't make any money from my pics), so keeping the cost as low as possible while still getting something fairly nice is a priority. It would be a while before I made this purchase, too - probably a couple of months, at least - so no big rush. This is merely an opinion-seeking post. I shoot with a Sony a290 and currently have a Sigma 18-50 f2.8-4.5, a Sigma 70-300, and an old manual 135mm prime. When traveling, I love to take landscape photos and indoor shots in museums and such. My 18-50 isn't quite wide enough at times, thus the consideration of the UWA. From my research (based on price and reviews), I'm currently leaning toward the Tokina 11-16 f2.8. Anyone have an hands-on time with this lens (regardless of mount)? Or have another you'd recommend? I plan to rent the Tokina (or another if there are any good suggestions) when we travel this summer to see how I feel about using a UWA. For those who have one or have used one, do you think it would be useful enough to warrant the purchase? Or should I just rent when I'm planning to travel? I don't think I would really need it at other times; the vast majority of my photos otherwise are of my daughter and the combo of the two Sigmas works great for that. Suggestions and opinions are appreciated, though I kindly ask that you keep in mind I can't afford nor justify a $1k+ lens. That's why I'm asking so early about this one - it's $399 (when its on sale), so I'm gonna have to make certain about the purchase before I drop the cash on it. Thanks!