I was looking at the EF-S 10-22mm f/3.5-4.5 USM to complement my Nifty Fifty. The ultra-wide angle is very appealing for me. On the review it says that "close-up" photos will have creative distortion (HUGE heads lol) and that for minimum barrel distortion subjects should be shot from a distance. But I don't recall it saying exactly how far the subject needs to be for that? Would I be able to shoot in a relatively confined indoor setting with out having to do some heavy post processing??