It's a pretty mind blowing lens, an 11mm on a full frame is great, just give you extra if you need it. Mostly used it for landscape and nightscape images so far and more than happy with the quality. The only downside I see for exploring is you can't fit a conventional filter to the front as the lens hood is integral to the lens, but it's been down an old mine and a couple of derps without any issues so far. Just an expensive bit of glass to replace if the front glass gets damaged!
