I'm directing/DP'ing a feature film in May and planning to shoot spherical lenses, 4K 16:9 in order to crop to 2.40:1 in post but protect the 16:9 frame should it be necessary in the future.
I know a lot of people still refer to it as 2.35:1 but that's actually an outdated term since the 1970's. I also know that the correct ratio is either rounded down to 2.39:1 or rounded up to 2.40:1 these days.
Our planned output is a 2K DCP and a 1080p copy on HDCAM SR for home video. I was wondering if there were any commercial/technical issues relating to finishing the film in either 2.35:1, 2.39:1 or 2.40:1 aspect ratios. For example, assuming the theatrical version would be digitally projected without an anamorphic lens unsqueezing the image, would cropping to any one of the mentioned aspect ratios have favourable/negative effects?
The last thing I would want is for all the hard work and money going into the film to be for nothing at the last second because a distributor says "we need it in 2.39:1 not 2.35:1" forcing us to go back to the post house and pay for another cropped version.
Thank you for taking the time to answer all of our questions on Reduser. The third edition of the Cinematography book you co-authored has been invaluable to me over the past few months.