ok @jespizua , I checked it out and it works the same on windows.
First setup a cplane rotated at a desired angle, second run plan command to align the camera to it.
Thanks!
I have to admit that this method is better than the rhinoscriptsyntax script because, as @Jarek said, there is no GetAngleEx method.
Still, I would like to see a Pick button for the camera angle. It will be more intuitive.