Originally Posted by RS3771
I've set up my VPL-VW1100ES with ISCO 1.25x A-lens
Is this SONY one of the new 4K 17:9 projectors?
I got to see the SONY 4K unit late last year and it was 17:9. It had a pixel count of 4096 x 2160 and it would have required a 1.25x A-lens in that mode. It could be set to 16:9 and use a standard 1.33x lens but its output would have been clipped back to 3840 x 2160.
As for the some of the image disappearing, yes that is supposed to happen when you scale for CIH regardless of what set up you have.
The goal of CIH is to keep all ARs at the same height. Yet video is based on a CIW concept, so when the image is scaled, the ends of the image remain and the top/bottom get clipped which we hope are the black bars.
Think of it like this - a BD is 1920 x 1080. The letter-boxed portion is 1920 x 810 with the remaining 270 vertical pixels being used (wasted) on black bars.
When the projector scales the image, it essentially re-maps the image as if the chip was 1920 x 1440. Because there is only 1080 on the vertical, the remaining image is lost.
This is IDEAL for losing those black bars, but as you noticed, also removes some image from a 16:9 frame such as menu page as well.