I don't have a lot of reliable sources for SIGMA and Tamron, which isn't for a lack of trying. One of the most asked questions I get is “when will SIGMA and/or Tamron launch RF lenses?” With my answer usually being that I have no idea.
That may have changed this week, as a good source for other areas of the industry told me that at least SIGMA would be addressing the RF mount in 2022. While the source wasn't privy to the actual roadmap, they did think that we'd see 3-5 lenses announced for the RF mount in 2022. The biggest roadblock for SIGMA is apparently manufacturing capabilities beyond just the issues from the pandemic. This does make some sense, as SIGMA has said in the past that keeping up with demand is an ongoing challenge.
As for Tamron, I haven't heard a peep about their plans.
More to come…
Brian
But the experts on this forum keep telling us that it is Canon's fault that Sigma has not yet released any RF lenses. Don't tell me they are wrong!
I actually recently decided to not invest anymore in glasses for my R6 and instead buy a second camera but this time from Sony. I will keep my R6 for 4k 60p and the superior RF 70-200 2.8 for stills.
Consider the Sigma DSLR Art lenses designed for both the Nikon F and Canon EF mounts. The F mount is much smaller than the EF mount but Sigma seems to have compensated. For FF DN lenses, the smallest lens mount will be the Sony FE, which is about the same diameter as the Canon M mount and the Nikon F mount.
ML
BTW my biggest beef with the EF 85 1.4 Art is that is needs an 87mm filter. If you are shooting wide open in daylight even with the shutter at 1/8000 you are going to need an ND quite often.