Hey everyone, I currently own a 70-200 2.8 is which is an awesome lens. Ive been wanting to get a longer focal length for wildlife shots such as elk and whitetail deer. The 70-200 has worked great for the elk but I would still like a longer focal length. So my question is would it be worth it to get a 2x converter and pair it with the 70-200? Whats the IQ like if anyone has tried this combination? I know that the 2x would make it roughly 5.6 instead of 2.8, so would it be worth it to get a 2x converter, Or shell out more money for the 100-400?