You asked

Best camera for the canon ef 24 70mm f 2 8l usm?

For this lens, I'd pair it with a full frame body. On full frame it frames exactly as marked, 24-70mm, which is the whole reason to buy it. On APS-C it becomes roughly 38-112mm, so you'd be using a different lens.

Three full frame picks from the list:

The f/2.8 aperture stays constant across the zoom, which is why it's worth it. If you want the reasoning, see Lenses.

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