Video: Sony a9 falls short with Canon 300mm and 400mm lenses attached

<span id="__caret">_</span>�<span id="__caret">_</span>�<span id="__caret">_</span>�<span id="__caret">_</span>�<span id="__caret">_</span><br /> Sports shooters considering Sony's speedy a9 have one major hurdle to overcome: glass. There's a dearth of long, fast primes available to Sony FE shooters, and it seems like using off-brand gl...