While the 7D2 has more AF points, the 80D has the next generation AF system compared to the 7D2. The 7D2 only has one AF point capable f/8, while the 80D has 27 f/8 AF points. Advantage, 80D. The 1D Mark IV is a very good body, too. I would liken it to being a precursor to the 7D2. The 1D4 has a very good AF system.
70d to 7d mark ii. I’ve had my canon 70d since it first released. Before that I had a t3i so it was a big upgrade for me. I intentionally got the 70d because I thought I was going to take more video, but ended up just doing photos with it. I mostly photograph dogs (portrait and outdoor dog sports).
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