blb529 said:
I shoot sports with a 7d and non-is 70-200 2.8. With the primary goal of getting better performance at high ISOs, I see 5 real options:
1) 7d mark ii - $1500 on Amazon.
2) Nikon D750 - $1800 on Amazon.
3) Nikon D500 - $2000.
4) Canon 6dii - ? wait and hope the new version is in line with the d750 which would make it viable for sports
5) Canon 5diii - currently, renovated bodies are $2000 on Canon's site with strong likelihood of falling a bit
more as release of 5d4 seems imminent.
6) Spend time learning how to fix high ISO shots in lightroom.
As, from a financial perspective, #6 is currently the only real option - #6 it is. But, in 6-8 months time, what direction do you think you'd go?
Depends how high you want to go with ISO.
Noise-wise, Nikon's D750 is the best they have and the best in the list you gave above. 24mp gives you some cropping space for sports. It has 7fps which is very decent. The noise is low, clean images and high DR. It also has a fantastic AF system and 2 card slots.
For Canon, I'd skip the 5D3 - it still has great AF and IQ and it is a big leap over the 7D, but your money will be better spent in the next year if you hold out.
The 6D has better ISO performance than the 5D3, but the FPS is awful and the AF is lacking so I'd skip that too. (I know you didn't consider it, but threw it in there)
The 7D2 is a huge leap from the 7D you're currently using. Faster, better AF, and better image quality. Two card slots. Anti-Flicker if you're indoors for sporting event. The price has dropped that you can either just save the money over other cameras, or buy some glass.
The 6D2 is unlikely to have more than 6 FPS ...and in my view, 7 FPS is entry level for action. 8 and above preferred. 10-12 is king. It is also a huge mystery what AF it will have. If it gets the 5D3's...good. If not, then it is going to be weak. Image quality though will likely be superior to any of the choices above, including the D750. At best, it will be a reincarnation of the 5D3 with a superior sensor. But rumors say 1 card slot, so for me that's a no go. Also, it is unknown if it anti-flicker will be omitted from it. That to me is an awesome indoor sports feature. Who in this world enjoys shooting under those lights? Not me. Post-processing is a pain. That feature saves a lot of time and ups quality. Also, the 6D2 is probably 18 months out. Canon isn't announcing the 1DX for another month, and the 5D before summer. I can't imagine the 6D2 making it before the end of 2016. 80D could happen at the 2017 CES show.
D500 ...that thing has the speed we know that. No more resolution than the 7D2. While it has a hyped-up AF, in practice probably no better than Canon's AF. But a huge upgrade from your 7D. Two cards is good. The big deal is the huge ISO claims...
I for one, do not believe that Nikon has made a 1 to 1.5 stop leap in ISO performance from their previous generation crop sensors (D7200). I was comparing images of the 6D a full frame vs the D7200 on noise alone. ISO 6400 images are about the equal of the D7200's ISO 2500-3000. More than a stop better, but not 2 stops cleaner.
If Nikon's claims about the D500 are true, then the D500 will have EQUALED the high ISO noise performance of last generation's full frame cameras.
Um....NO.
I haven't seen that happen before. 2 generations? Yes. A crop that is two full generations/product cycles newer than a FF has equaled in noise. Seen that. Of course, a FF will always have a different perspective, more depth of field and will resolve better.
But hey, if it is true, then I'll get one when the price drops a little. Why wouldn't I want a high-speed crop with as good ISO as a 6D?
I'm not betting on that.
But to your question, I'd guess the Nikon will have better IQ at higher ISO than the 7D2 due to being newer sensor technology. At low ISO where there's little to no noise, they will be equal and the Canon has the edge since Canon has better glass. But that depends on what kind. Nikon's crop glass is good. Canon's advantage is the L glass.
I'd wait...
I'd wait to see if the D500 lives up to the hype. If it doesn't...
The 7D2 & D750 will only drop in price, and these are really capable cameras.
If you can live with losing 1fps and the loss of crop-zoom, the D750 is going to be a giant upgrade in terms of IQ over your 7D. If you want ultimate speed and crop factor, while still getting a big boost in IQ - the 7D2 is it. If having 10fps doesn't make or break your sports shooting, get the D750.