The weekend was dreary and cold on Saturday and I was able to practice on eagles at long distance and some eagles flying. The pictures were sharp, but due to the ISO I tried using (3200 to 4000) the pictures were not usable. Today provided a better opportunity to test in flight focus tracking. Four osprey provided the opportunity to take multiple shots at various ISO and shutter speeds.
ISO 1000, f7.1 1/3200, +1 EC
ISO 1000, f 7.1, 1/2000, +1 EC
ISO 1000, f7.1, 1/1250 +1 EC