The FBX plug-in now supports the Maya Render Settings Pixel Aspect Ratio value. The Pixel Aspect Ratio value is automatically exported and imported into Maya. This support assists with the import of cameras into Maya Composite by maintaining camera fidelity.
The aspect ratio represents the aspect ratio of the display device on which you view the rendered image. The device aspect ratio represents the image aspect ratio multiplied by the pixel aspect ratio.
This process occurs automatically; there are no settings to activate to obtain this support.