« on: November 05, 2014, 09:25:54 AM »
Hi XPS, I just started have those same two problems with my 6D. It's about 18 months old, and has probably done 100 000 shots. I have recently changed 3 elements in my system:
1. Using a 120-300 sigma with canon 2x III.
2. After-market battery grip.
3. After-market batteries.
I suspect it is the battery grip. I have removed grip and used a single battery, and the problems seems to go away, but as the problem seems intermittent I've yet to confirm the correlation.
My advice: Buy a 7D II, put the 6D in for warranty repair and sell it when it eventually returns fixed
My preference is to wait, until the 5DIV will appear on the market. I know, this could happen in 2016 or so...
But my personal experience with my friend brandnew 7DII is not that, I expected in better Iso-quality. I know, this will make some persons here angry, but this is my opinion. We shot some lynx and wolves on monday in an small zoo near Munich. My 6D (on monday it worked 90% of the time) has an awesome low light capability. The 7DII is much better than my 7D, but not even as goog as the 6D´s.
The AF system of the 7DII is better than my 7D´s. Both using an 100-400 L lens, he got much more sharp pictures of fast passing falcons. Again, if the bird is sitting in the dark trees, my 6D is superior.
Personally, I will wait until Canon announces an FF cam with the same IQ and an faster AF system. It is better to wait and buy an really satisfying Camera, than one, that is still not that Cam I wanted to have. My photoraphical knowledge is not so good, so I need some more technical support from the Camera/lens.