SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary Versus SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary » 100400mm FF 6D 1500_1
Here is the 100-400mm at 400mm on the full-frame 6D.
100400mm FF 6D 1500_1 100400mm FF 6D 1500_1