>>4107100Honestly, I use a d780, 24-70mm f2.8 and a massive speedlight for events / concerts. It does get heavy after long nights but having a really comfy sling helps - ditch the branded camera strap or thin seatbelt type straps for a comfy neoprene one. I use a blackrapid harness as a single sling if I'm not shooting with 2 bodies. Also it can help to brace yourself against something, the camera against something, or tuck your arms into your body when using the viewfinder to take some of the load off of your arms.
