dhachey77 said:The AF isn't accurate and fast enough, and the shutter speed is too slow for BIF.
Mt Spokane Photography said:While the 5D MK III is obviously superior for tracking birds in flight, I recently found a batch of old National Geographic magazines from 1916 in with some old things I had bought at a estate sale.
There were plenty of sporting events, wild life, and even birds in flight. ...

neuroanatomist said:dhachey77 said:The AF isn't accurate and fast enough, and the shutter speed is too slow for BIF.
But perhaps you mean frame rate, and the 33% faster fps of the 5DIII definitely gives a better chance of catching optimal wing position.