[Adam Rosenberg] “Why 2.35 and not 2.33 or 2.37?”
Because back in the day it would have required custom glass to natively achieve different ARs outside of matting, and if you’re simply matting, then you’re just losing information. The switch from the 4:3 standard (it’s all 4:3 film from 3:2 AR 35mm stock being run sideways through a projector) to 1.85:1 via matting was mostly a “we must compete with TV!” switcheroo to make movies seem more epic than the shows you got in the comfort of your own living room, and it stuck. Frankly, I’ve enjoyed some modern 4:3 films (The Artist, The Grand Budapest Hotel), and at no point found myself comparing it to TV or feeling constricted. I find the selection of ARs to be rather arbitrary, based on one’s on emotional reaction to the format with technical reasons being fumbled about later.
There is one specific reason to, say, go anamorphic vs. spherical. That would be the vistas. If you’re planning incredibly wide vista shots, then anamorphic may be more appropriate because it’s allowed to stretch out. You can absolutely shoot wide enough to get those vistas in 16:9/1.85:1, but the look of it in that AR may seem a bit odd or wonky. Whether this is entirely due to conditioning (i.e. if you’d never seen a movie before would a 12mm spherical vs a 25mm anamorphic not look as pleasant to the eye) or not is irrelevant, as, either way, if it bugs you it bugs you.
I would ask first, what is the issue with cropping “too little”? Are there elements in the shot that shouldn’t be there like a boom pole? Are there some wonky compositions that reframing would help fix, and cropping looks better than zooming? If so, then I’d simply pick which ever matting AR works best to resolve these elements and simply render it out letterboxed in a 16:9 container.
If, on the other hand, you need to fake a “filmic” element in order to sell the idea of the short film as “looking like a movie”, then I would surmise there are more problems with it than just not seeming cinematic from having a letterboxing element.