Camera: aspect ratio 2.40:1

Hello everyone,
sorry for the dumb question, but I want to be sure I’m doing the right thing.
I’m starting an animation and I want to use an aspect ratio of 2.40:1 in order to have a more cinematographic effect.
I made these change to my scene and tell me what you think:
Camera:Lens: Panoramic, 24mm
Camera: Full Frame 35Mm Film
Sensor: 36mm

Resolution: 1728, 720 (that’s because 720*2.4=1728)
Aspect Ratio: 1,1

Do you think are those options enough to render a anamorphic render and to use in compositing without trouble?
Thanks in advance.