The Tradeoff Between Quality and Fatigue: Camera Rigs

I am 8 hours into a non-stop hand held shoot using a fully loaded Sony PMW-F3 for a documentary stye shoot when my back starts to give me serious trouble. The F3 is not a light camera to begin with but when you add all the necessary accessories for a run-n-gun style shoot it gets monstrous. I was starting to miss shots and have trouble keeping the rig steady during long interviews. By the time we called cut I would have to set the camera on the ground because I was literally exhausted.