Ils sont quand même bizarres les ingénieurs de canon...
Sur le 90D ils ont ajouté un deuxième joystick a l’arrière.
tres bien...
Mais les deux joysticks ont la même fonction, on peut pas les différencier ...

A new 8-way joystick (multi-controller in Canon-speak) is the main change to the 90D's design. The 80D already had one (with a control dial around it) and the 90D adds another. The good news is that this controller is located in a convenient place for adjusting the focus point. The bad news is that the controller can only serve the same function as the other one: their settings cannot be distinct.

https://www.dpreview.com/reviews/can...-it-compares/3