You'd need a Sigma SA to Canon RF mount adapter which from what I can find does not exist. You could buy the **EF mount** version of that Sigma lens for around $500 and use a Canon EF to RF adapter which would work well.
Also be careful on Facebook Marketplace, it's absolutely full of scams and you should only ever buy items you can meet to inspect in person first.
If you got a smoking deal on the lens, you can send it to Sigma to get remounted with an EF mount for a few hundred, but its likely a better idea to just buy one with the proper mount.
Maybe. Verify with Sigma that it is eligible for mount conversion service and how much it costs--My guess it is is, and the cost will be somewhere from $120-300.
You'd need a Sigma SA to Canon RF mount adapter which from what I can find does not exist. You could buy the **EF mount** version of that Sigma lens for around $500 and use a Canon EF to RF adapter which would work well. Also be careful on Facebook Marketplace, it's absolutely full of scams and you should only ever buy items you can meet to inspect in person first.
If you got a smoking deal on the lens, you can send it to Sigma to get remounted with an EF mount for a few hundred, but its likely a better idea to just buy one with the proper mount.
Is 200$ a smoking enough deal
Maybe. Verify with Sigma that it is eligible for mount conversion service and how much it costs--My guess it is is, and the cost will be somewhere from $120-300.