You would lose a lot of picture content doing # 2!It is possible to use autoaspect with a 16:9 screen in at least 2 ways:
1) Just use the aspect detect to move electromechanical masks on a screen
2) Have auto-aspect auto zoom wider aspect content to fill the screen.
I do 1). I'm not suggesting 2) is a good idea - creative intent and all that - but it is, nevertheless, an option, for those who dislike black bars.
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