Shooting with Sony F5, the idea is to have a final film with a cinemascope look once it'll be projected.
I know I can't have the choice but to shoot with the native aspect ration of 17:9 of the F5, I'll so put the letterboxing markers (2.4) that crops the native aspect ratio.
My question is: do I lose lots of resolution once I put 2.4 mattes on the 17:9 native to create the cinemascope look? What could be the solutions? If I shoot 4K external could be a better compromise to the loss of resolution? Since I'm recording with an higher resolution then the internal 2K?
(When I set the mattes in the camera, do I record already with them? or the markers are just guide lines that help me framing knowing what would be the cinemascope look at the end?)
If I shoot with Red Epic (Dragon sensor), what could be the best aspect ratio settings for a final cinemascope look? 6 wide, or do I crop later with the mattes?
I can't use any anamorphic so I can't take this possibility into account.
Thanks a lot for any help!