Without owning a 90D. I have read that the focus system on the 90D is not as responsive as the system on the 7D2. Part of the reason is probably due to the fact that the 90D has one processor and the 7D2 has two, one of which is dedicated to the focus system.
This is probably something you will just have to live with.
Rod
Thanks for that - at least I know that now.







