Don't Sell Short, Movies Shot On Film, Top Quality Negatives = or Surpass 4k
NorthSky said "How long till 'Spartacus' on real UHD? Never, because it wasn't filmed in 4K."
Actually, since 1960's Spartacus was shot in the large format Super Technirama film process, the original camera negative of the film, which has been meticulously restored, possesses a level of resolution that is greater than 4k.
A regular 35 millimeter camera negative possesses a level of resolution that is the equal of 4k, so even a movie shot in standard 35mm can fully exploit the resolution capacity of a 4k digital format, if the negative of such a movie is in pristine condition, and that original camera negative is then used as the source for a carefully done digital scan. (Unfortunately, original camera negatives rarely end up being in such an excellent condition, because they usually suffer the wear and tear that results from prints and dupes being made from them.)
In the case of Spartacus, although the movie was shot on 35mm film, the Super Technirama process utilized for that movie involved running the film horizontally through the camera while shooting it, rather than it going through the camera vertically as in done with a standard 35mm shoot. Running the film horizontally resulted in each frame of the movie taking up a considerably larger area of exposed film than is the case when 35 mm film is exposed the the standard way, which is used for 99% plus, of film productions.
Long story short, the greater area possessed by each frame of a Super Technirama production, like Spartacus, yielded more than 2 times the resolution achieved by exposing 35mm film in the usual way. That's why Spartacus is classified as a large format film, even though it was only shot on 35mm film stock.
And the original camera negative of Spartacus certainly possesses resolution that well exceeds 4k, so that if its original camera negative would serve as the source for an 8k digital scan, as was done with Lawrence of Arabia, for example, the results, in terms of detail and resolution, would fully exploit UHD 4k Blu-ray's ability to render those aspects of performance.
P.S.- I apologize to you NorthSky, because my comments were written and posted, before I read your later post, where you indicated that you certainly understand just how capable film is of providing very high resolution.
Last edited by sarahb75; 06-12-2016 at 11:25 AM.
Reason: a correction, because I did not read all of the posts