AlanU wrote in post #18205605
I stated "If your shooting slow to static subjects or require decent quantity of photos shooting action sports the 6D will work for you
The 6D destroys the 1dmk4 when it comes to image quality and high ISO capabilities. However demanding AF-C when the subject is coming towards you the 1dmk4 AF will "WIN". For image quality I'd take a 6D any day over a 1dmk4 for any events work (so unfortunate 6d has a single SD memory slot).
The 80D is refreshing because the AF is very responsive able to capture any child sliding down a big slide or on a swing. If your 50 feet away (picking random number) you can track any soccer player on the field.
6d the buffer simply isn't designed for rapid fire sports documentation. However a soccer mom/dad will do fine snapping their child playing soccer on a field. 6D can do it but there are better tools for the task.
If you owned a 5dmk3 or 5dmk4 for stills you could sell your 80D and 1dmk4. You'd lose your "built in" 1.6 TC crop factor
The 6D was without a doubt crippled by canon both in 1/4000 max shutter limitation and AF to create a rift between the 5dmk3 4 years ago. The Nikon D750 is a good example of what Canon should have done with the 6D. Knowing Canon they are holding back on the AF for a 6dmk2.
I can see your defensive about your 6d but I think your missing the point that there are other tools much better in acquiring AF to track subjects. 80D puts the 6d to shame in many respects. But the 6D is superior in IQ.
I'm still supposing you've never used a 6D. The 'crippled' 6D's AF outperforms the original 7D. Period. The 6D will track that kid coming down a slide as well as the 1DX II, or any other Canon camera from the last 7 or 8 years. That type of target is not a challenge to the AF system of a T3i.
I have no problems with the AF system on my 6D. If I can keep the center point on the target, the 6D is as good as the 1DIV. The 1DIV shines when I can't keep the center point on target, or when other objects get between me and my subject, or when I want 10 fps.
It sounds like you are regurgitating review(er)s who blasted the 6D. ISO 50 and 1/4000 is the same exposure as ISO 100 and 1/8000. I've got thousand of sports/athletic photos. None of them are faster then 1/4000. I've also never had to stop down my fast primes past f/2.2 to get the shot at 1/4000.
The 6D was introduced as a high-ISO, high-IQ, inexpensive, full-frame camera. It is every bit of all of that. Canon did offer a version of the 6D with a built-in grip, killer AF, 12 fps, and the kitchen sink. They called it the 1DX. I know my 6D has limitations. That is why I own a 1DIV. If someone can only afford, or only wants, one body, the 6D is good all-arounder.