I'm planning to go back to the UK for vacation this May. I'm still learning this camera, coming from a P&S, taking photos mostly on the weekends. I'll want to take some nice wide-angle shots and would like to try fisheye. I have the 16-50 zoom lens but not fond of it. Definitely soft much of the time, might be me. I can't justify a really 12mm Touit or a 10-18; my skill level has a long way to go before I'll spend that kind of money on a lens. So I'm considering either the Rokinon fisheye or the Sony 16mm combo with the wide angle and the fisheye attachment. I'm thinking that when I'm in a big landscape setting the wide-angle will work well and in a church, a fisheye could be fun. My swap-out lenses for different situations could be the SEL35F18 and the SEL55210. Maybe this combo would be easy to snap on-and-off - easier than swapping lenses from the 16-50 if I stick with that, to the fisheye. Not sure though if the results from the 16 would be a bit better than the 16-50 since it's a prime. I heard the 20 is better, but not as wide as I'd like. Any advice appreciated!