My first foreign travel with the 100-400mm II + 7DII. Had to fly out to the Weizmann institute in Israel for less than two days, just enough time for a mornings shooting on campus. The 7DII and 100-400 are sufficiently small that I could add them to hand luggage. It's very difficult to see birds on campus but patience and waiting with camera in hand paid off. These are all 100% crops. I am pretty happy with the system for ease of travel and hand holding.