Most films for cinema are not in 16:9 format. If I shot a movie in 16:9 format in Ultra HD, would there be any technical issue with getting it played in theatres?
closed as not a real question by Dr Mayhem, ObscureRobot, Bart Arondson, Neil Fein, Travis Dtfsu Crum Feb 1 at 7:26
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AS to source material:
So recording in 16:9 is not gonna be a problem.
For technical details, see this link for an overview: