Here is a rolling shutter test video of the Canon EOS-1D X Mark III vs Sony a9 II full frame cameras.
Both the Canon EOS-1D X Mark III DSLR and the Sony a9 II mirrorless models are designed for the professional sports, photojournalist, wildlife and wedding photographers.
Check out therolling shutter test comparison between the Canon 1DX Mark III and the Sony a9 II cameras :
Canon EOS-1D X Mark III body: $6,499 at Amazon, B&H, Adorama.
Sony a9 II body: $4,498 at Amazon , B&H, Adorama.
Read more: Best Lenses for Canon 1D X Mark III and Best Lenses for Sony a9 II.