The inability to do close up macro on the 1020 renders every code scanning useless. Trying to zoom in, it does go in focus, but almost immediately loses focus.
Yeah, you don't have to be very close at all to scan bar/QR codes with the 1020. Even from over a foot (12 inches) away it picks them up just fine.
This depends completely on the size of the bar code. I have not been able to scan a single code on a food package, that I've tried. MyFitnessPal.