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.
5D IV, 5DS R, 7D II, EOS-M, Powershot G3 X, 400mm DO II, 300/2.8 II, 1.4xTC III, 2xTC III, EF 1.8 STM, EF 70-200/4 IS, EF 24-105, 15-85, 100-400 II, Sigma 10-20, Sigma 150-600mm C, EOS-M5 15-45, f/2 22, 11-22, Samyang 8mm f/2.8 fisheye