I need to stop buying prime lenses and get something that does not require taking off you bag, opening, swaping lenses, and than doing it all ower again :D but primes are way cheaper.
I was not even sure do i need a 16mm, but the widest i have on the RF monut is 35mm, and 35mm is often not that wide. A friend of mine was coming home from Canada and i saw this lens on craigslist for a decent price (problem with RF lenses here is that it is a new mount and there are almost non to finde used).
For this short period of time i used it (2 days) it is more of a fun lens. The distortion is pretty big, good amount of vineting. But it does give you a new perspective, and a good chank of viwe in tight spaces.