Canon Germany just issued an official statement – The interview was published on The German site Photografix Magazine
Take a look at what Canon Germany said about the Viltrox lens ban
SHENZHEN JUEYING TECHNOLOGY CO.LTD, manufactures autofocus lenses for Canon RF mounts under the brand name “Viltrox”. Canon believes that these products infringe their patent and design rights and has therefore requested the company to stop all activities that infringe Canon’s intellectual property rights.
Canon Germany believes that third-party lens makers Viltrox infringe on their patent and design rights.
TNC takes – Whatever has happened right now, it makes the entire situation very clear Canon doesn’t want third-party lens makers to make RF Lenses. No issue exists with other brands such as Nikon, Sony, and Fuji. Such, a decision will impact Canon growing consumer base.
Also, see – Best Lenses for Canon R7
Get LIVE RUMORS –> FACEBOOK | TWITTER | INSTAGRAM to get live news + Canon rumors 24X7
source PhotogragixMag | Via PR.com
I think you are overstating it a bit, it does not want third party AF lenses, they haven’t stopped those just making manual focus lenses for RF. You will find they think Viltrox has violated RF patents in reverse engineering the AF protocols. Now Viltrox sell lenses for Z mount too, and Nikon hasn’t stopped them. Did Nikon license the mount to Viltrox, did Viltrox reverse engineering the mount and not violate patents? It is not illegal to reverse engineer in itself, but maybe the software for the AF was violated to get the AF to work. Software is more problematic than hardware from legal viewpoint.