Sigma 24–70 f/2.8 Art on Canon R6 — unreliable AF and jittery handheld footage. Worth upgrading to the RF version?

Hey everyone,

I’m using a Sigma 24–70mm f/2.8 Art (EF mount) on my Canon R6 with an adapter. The image looks great, but the autofocus just isn’t reliable — it doesn’t consistently stay on the person’s face. I recently shot a podcast and the focus was hunting like crazy.

The bigger problem though is stabilization — when I shoot handheld, the footage is so jittery it’s barely usable. I can’t tell if it’s the lens, the adapter, or just the R6’s IBIS acting weird with non-native glass.

Now I’m considering investing in the Canon RF 24–70 f/2.8L IS, but it’s a big chunk of money, so I’d only pull the trigger if the difference in AF reliability and stabilization is actually noticeable.

Anyone here made that specific switch? Was it worth it?