CHG_CANON wrote:
That would not be the idea of 'adapted' lenses, in the context I meant, nor in the context of the OP's question. In the case of both Canon and Nikon, they have provided a mount adapter for their brand lenses on their brand cameras via their brand adapter.
Contrast that to a 3rd party product, the only option, to mix and match brand-x lenses on brand-y bodies via brand-z adapter.
The OP never stated anything about using adapted lenses. But I agree that using lenses from manufacturer A on camera B using adapter C is not the best situation. The Metabones adapter probably provides the best performance when adapting lenses but is not perfect.