Lapwings in flight
1/5000, f/5.6, iso640, 300mm f/2.8 II + 2xTC, 5DIII
Full frame compressed to 2400x1600.
It is remarkable that all of the lapwings are in focus. This where my 300mm combo beats my Tamron 150-600 as it sharp across the whole frame at 600mm.
5DS R, 7D II, EOS-M, Powershot G3 X, 300/2.8 II, 1.4xTC III, 2xTC III, EF 35 f/2 IS, EF 70-200/4 IS, EF 24-105, 15-85, 100-400 II, Sigma 10-20, EOS-M 18-55, f/2 22, 11-22