Originally Posted by olyteddy
No one disputes the width of the film stock. What is being discussed is the image size. In the post that stared this you claim:
And as I pointed out, because of the sprockets, you just can't use the whole width of the film stock, hence the discrepancy. Take another look at the Wikipedia illustration and you'll see the actual sizes of the frames. Most film, iirc, is shot in 'Academy' ratio and later cropped for projection.
OK. Here it is from my collection of Universal material, that i have not looked at in 14 years. The latest is from Kodak circa 1999.
Motion Picture 35MM Full Aperture is, holding the Film perforations vertical,(NOTE:MM=Millimeters) 21.95MM by 18.6MM. IMAX 70MM viewed from holding Film perforations Horizontal, 70MM by 48.5MM. NOTE: This is the capture area only. For more information on total film width and maximum length refer to diagram:C.
Nope, can't upload diagram C. Nice Kodak not for distrubition Copyright mark at the bottom of the diagram. Sorry.
That Wikipedia picture you keep referencing, you can keep Academy, Flat and scope and toss the others. They are long dead formats. "original" 70MM,(70MMx24.25MM) better known as panavision, died in 1961. John Dykstra and George Lucas brought it back to life for the VFX shots on Star Wars. It has enjoyed a good run for VFX, but not one movie since 1961 has been entirely filmed with it.
Two things. 1st no mater if it is on 65MM, it is copied to 35MM for distribution, in flat or scope. IMAX is filmed on IMAX 70MM film and shown on IMAX 70MM film. As a further note IMAX is only slightly larger on all four sides than Academy ratio. TV's 4:3 is smaller than Academy. 2nd, there is not enough projectionist left to swap a film projector from 35MM to 65MM or original 70MM. It would take me a few hours, i started as a projectionist assistant in 1984. Even back then it was flat or scope. No one filmed nor showed Academy anymore, it's just a reference. And those who do show Academy, is showing 1930 up to 1951 Motion Pictures, such as art houses, or theaters that specialize in classic content. Or it's the beginning of a Disney Wizard of Oz reboot/prequel.
There is 36 working film projectors in theaters scattered around Texas. I maintain 9 of them. 1 of these 9 shows limited new theatrical releases. They don't make them anymore, films and projectors. New parts are becoming harder and harder to get. The nature of lenses between a film projector and a digital projector is worlds apart, so they won't even interchange and display correctly. Studios have pulled teeth to stop from sending film prints. The only prints out there are 35MM, 65MM, 70MM and a limited supply of IMAX 70MM because IMAX is/already going 100% digital capture and display via dual Barco 4K projectors.
Prior to 1975, a projectionist was sent "raw film" raw as in copied from the original negative, with out cropping done. It was the projectionist job to set the projector for what was showing, flat or scope or panavision or panorama, Academy if you go back far enough. It was also the projectionist job to have the correct lens for the format showing. It was also the projectionist job to run and preview the film for any problems, before the box office opened to insure the best audio and image possible. Today, it is press start.