Hi Geoff F, I did hire the Canon 400mm f/5.6, great to carry around and I got some great shots. I also noticed that many bird photographers were using it and getting excellent results. I took a jump and went to the 300 2.8 to see what the difference is and if all the reviews about this lens were right.
Haven’t really decided what lens to buy yet, may try a zoom next, perhaps the 100 – 400.
Got this buzzard with the 400 5.6 last week