7D and Sigma 120-300 + TC 1.4
Nice BIF Martin. Wonder why did you used high ISO if it was sunny day? I personally avoid higher ISO than 800-1000 on my 7D...
I did few test with 2X TC as well and the result was nice. I am on my way to sale my 120-300 and upgrade to OS version. I like to use IS or OS even if I use a monopod. During my last safari in Africa I found using IS on the beanbag very useful. Even now in July during my next visit to Africa I will bring with me 120-300 with OS and beanbag + monopod.
Have a nice day