I have a D7200 and a D500. I shoot wildlife mainly and I am thinking of replacing my D7200. I find the D7200 is not the most accurate focusing camera. I liked it because of the 24mp. I am looking at second hand D850 or D5. I have wanted to try full frame even though I will lose the crop factor. Anything else I should be looking at? The only downfall of the D500 is the 20mp sensor and that concerns me about the D5 as well. I have heard the D810 is not a great wildlife camera due to it's small buffer and slow focusing. Thanks everyone.