Canon 1DX
f/4 500mm with 1.4
f/5.6
1/2500
ISO 1000
This is one from my time last weekend with the Fulmars in my hometown. The BG is flowering gorse bushes, growing on the cliff. Since I stepped up to the 1DX, I find it better, locking onto BIF, against a dark BG, even with the 1.4 attached on a Mk1 lens.
Will