Are there many canon 400 5.6 users on here and if so are you happy with this lens. I used to have the 2.8 400 but found it to big and heavy also a risk using from my canoe and boat. When I sold the lens I planned on getting the 5.6 but never did, now that feeling for more magnification is back due to my daughter using her powershot sx 50 and showing me up. Its mainly for wildlife and surf shots.
Jon