It depends on your optics… scopes usually come with a Vixen-style dovetail (at least, on the smaller end).
The Evoguide II for example includes the dovetail. With a camera lens, I’d recommend a pair of Losmandy rings large enough to support your lens.
While on the subject of the Evoguide, you would certainly need the FF for a Canon sized sensor, but the Skywatcher FF has only 17.5mm back focus - so you’d never get it in focus. The Starizona EvoFF has 55mm back focus, so by the time you add a T-thread Canon adapter, that will hit the spot.
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