I'm not telling! :angel: But I will admit there have never been more than two people in my electronics firm - and if you've been into computing since the 80's you likely have used some of my products too.
Canon is what the discussion is about. I believe Sigma has themselves stated that they have no such agreements with Canon. So speculation isn't really needed here.
Why the big secret if they're products anyone might have had? Anyway, it's not relevant.
Regards your statement about speculation
"... isn't really needed here", since you can only assert
"I believe Sigma has themselves stated...", the whole thing is speculation. Something not speculation would be backed up with an actual statement by Sigma in an article reference, interview, etc. (This doesn't mean that I don't think it's the case, btw, it simply means that it's a speculation that is likely true.)
The fact is that few photographers in the camera marketplace have any interest in adapting lenses. Only oddballs like the folks on this forum (myself included ... ;-) pursue such stuff. That's not much market to amortize the costs of development. A lot of people have adapted lenses to Micro-FourThirds bodies ... fewer to FourThirds bodies ... and "a lot" in these cases probably means a couple thousand at most. That's a niche market
The pro-video marketplace is a small niche market even by comparison to that and prices are astronomical compared to still cameras because of the tiny volumes in sales. That's why it sees all these large-sensor cameras that can do video as a huge savings. A $700 adapter to use the Canon lenses already in hand? Miniscule percentages of the equipment costs. Even a 5D Mark II isn't considered expensive when it replaces a $70K video camera. Buy five and enjoy the bargain prices ... ! ;-)
BTW, Uwe: that Panasonic looks darn cool! And for the $5000 price tag, a bargain! I'd love to play with one someday.