I'd not even look at the 780 if you're coming from an Olympus. It simply doesn't put enough pixels on the subject. Frankly the D750 you already own will be 95% as good at long lens work, and can run a grip (the D780 does have better AF tracking and high ISO, but not night & day better)
The D500+500/5.6PF will give you very similar pixel density to the Oly setup, with better AF tracking. And in a package that's smaller & lighter than the E-M1X (the D500 does not need its grip for max performance, just handling & battery life).
Jun 15, 2020 at 09:57 AM
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