>>2989262I use both the 50 1.8 and the 24 2.8 STM all the time on APSC, and I can tell you that you won't use the 50mm inside, at all, it's way too tight, not many buildings will have enough room inside for you to move back enough to frame your shot, and it's awkward anyway when you're among people.
Get the 24 STM, it's the best start imo, cheap, faster than your current 18-200, and very low profile too (pancake) which is a neat feature when you're in a social environnement.