Projection screens: 1.85 or 2.35
Posted 18 February 2006 - 05:46 PM
Maybe John Pytlak knows this.
Posted 18 February 2006 - 08:54 PM
In the UK they're usually 2.35 with motorised side masking.
I know of some that are roll screens and therefore the bottom moves up and down, but that's not really correct - it gives you horrible lens centering issues as the images are then not common centre.
Posted 18 February 2006 - 10:10 PM
Posted 19 February 2006 - 05:58 PM
Most cinemas do exactly as you describe. Films are either shot for 1:1.85 (widescreen) or 1:2.35 (anamorphic). The anamorphic ones require an anamorphic lens to project the image, which is squeezed by a ratio of 2:1 on the film itself. Cinema screens have black curtains or tabs which are adjusted to suit the image, so that the edge is defined by the tab itself, not the projected edge of the projector mask.
Many cinemas in Europe, (and some in the US and Australia for that matter) fudge the exact ratio a bit: the 1.85 is often a little taller, closer to 1:1.66, which is sometimes called the "European" widescreen ratio, as it corresponds to the super 16 negative ratio.