"Only" lenses with the EF/EF-S bayonet can be used with the Canon EOS 7 Mark II. For example, you can use the Canon EOS R7 with RF and RF-S bayonet to use this lens.
In principle, it is always possible that we are not the cheapest on the market. Various factors can lead to this, such as the purchase quantity or conditions.
No. It only works the other way round, i.e. an EF lens can be mounted on an EOS Mirrorless camera with an adapter, but not an RF lens on a DSLR (such as the EOS 80D).
The lens must be able to move in the lens, this is the image stabiliser. When the camera is switched on, the click-clack should be less audible because the stabilisation is active. As long as the image stabilisation works (and the image quality is OK) I wouldn't worry. Switch the stabiliser on/off on the lens for testing. To be on the safe side, go to a photo shop to test it (and consume something there at the next opportunity😉).
Hello,
Indeed you can benefit from it, you just have to register with Canon after the purchase.
In any case, I benefit from it for a product bought from Galaxus.
Please accept my best regards.
No, there is no such thing. It is simply not technically possible because of the different flange focal lengths. The mirrorless cameras all have a much shorter flange focal length than the SLR cameras. That is why there is enough space for adapters. Logically, the other way round is not possible. This has nothing whatsoever to do with "desired".