>>4076303>Is there such a thing as a f1.4 zoom lens for APS-C?You could use a f/2.8 zoom lens with a .71x speedbooster I guess but that takes you just under f/2 (and is expensive as fuck, the Metabones speedbooster for Canon EF to Sony E for example is $699).
Honestly noise complaints are blown out of proportion with sensor size. The sanest path is what someone else told you, use a flash. Try using an off-camera one (or at least bounce the one on the camera on the ceiling or a wall). There's a reason they assemble mini-studios at the wedding receptions. It's how you get great pictures, throwing light at your subjects. The quality of light matters too. Unaltered on-camera flash looks pretty horrid unless you're trying to get a snapshot aesthetic (think Uncle T-Bone, here pictured with a Lumix).