Leica 90/2 Summicron-R to L-mount

[Miki]

Thinking to adapt 90/ R-mount to Lumix S camera with URTH adapter.
And, maybe, one of those 135mm R-mount lenses, too.
Has anyone experience with adapting R-mount Leica lenses to Lumix S-system?
Are those R lenses work as good on Lumix S camera as on Leica?
Are there any downsides in IQ?

 

[DonaldM]

I have both lenses you mentioned. I don’t see a degradation compared to my SL.

 

[Miki]

I have both lenses you mentioned. I don’t see a degradation compared to my SL.

Thank you, Donald That's great help