I currently shoot with a D7500 & D7200 bodies paired with my AF-S NIKKOR 80-400mm f/4.5-5.6G ED VR. Looking or a little more distance for bird photography and lighter. Anyone using this lense with a Teleconverter for nature related shooting. The other option is a AF-S NIKKOR 500mm f/5.6E PF ED VR, but pretty expensive. Opinions and input appreciated.