I was in the market for a red one for a short film im making and I was wondering what would need to be purchased in order to use the camera for any basic practical filmmaking needs (lenses, accessories, etc) beyond just the body itself and the price range I'd be looking at. What lenses would I need? Also how exactly does a red one operate? is there a hard drive built into the camera or would cables need to be run to an external computer to record the highest quality footage?