My set up: KM Maxxum 7D, KM 80-200/2.8 APO G, Kenko Pro 300 2x TC.
Without good sunlight I had to manual focus. With good light auto focus was OK. No tripod needed, built in stabilization. All metal mounts, no problems with the physical hook-up.
bluebird11 Large Web view.jpg
1/1000, F8, 200mm x 2= 400mm.
Pat