Doctor M said:

I can agree with that logic.

Most sources say a 4k scan is 100% of the detail of a full size print. I'd think a 16mm has half that.

A 16mm or 35mm negative can have more than 4K of data, but a print never really does.

A good 16mm print is lucky to have 1080P worth of *real* data, and the dynamic range tends to be crushed as well. A reduction print is lucky to offer anything much above SD resolutions and dynamic range.

However, you want to work at higher than your delivery resolution whenever possible.

i.e. if you want to deliver a 720P 8bit print, then work in at least 1080P 10bit when doing your edits/correction etc.

If you want to deliver a 1080P print, then ideally you would do all of the editing work in 4K. Want to deliver in SD, then work in 720P.

Everything you do to it causes some loss, stabilising, colour correcting etc. so you want to work in the highest resolution/bit depth you can to avoid data loss and have the ability to work at a sub-pixel level.

Then for the final output you render at the lower resolution.