EOS 5D Mark IV
- Feb 25, 2015
[..]understand that IS functionality has been disabled in the lens.[..]
Nitpick: With EF-M lenses you can't disable IS in the lens, there's no switch for that. You can only disable it through software using the menu in the camera.
So you have to take the cameras word for it, especially with wide lenses that have a silent IS motor.