I had a chance to see the lens slide in front of the LUMIS and I would guetimate the reduction closer to 15-18% max. With the Lighting Reference the difference was in the 25-30%. I have a theory Xenon displays are more suceptible, but not a clue why. Just the observational data.
I for one believe that the Lumis BENEFITS from the ISCO lens. Anyone wanting to discuss the why's needs to get a copy of SIM2's demo material at EHX: ELTON JOHN'S 60 and Wild Hogs. The later was a far more homogenous picture, as something a little weird was going one with Elton which looked like a photoshop montage cutout, like when 3d movies look like the objects are flat but still has overall excellent depth. In any event a slight reduction odf this effect that was caused by intense ANSI coupled with some kind of noise filtering and contour enhancement video processing. That Elton John reminded me of the Meridian demo a bit, could the video processor be a Marvel? Probably not but the effect on Elton was distracting. Then the lens slid in, the programme changed and the image was very nice and cinematic.
I do admonish that although these numbers are outstanding somehow the overall picture does not come close to the contrast enhanced DCI machines, the filtered two dimensional cutout effect IS NOT THE WAY IT WAS MASTERED so the device is injecting it's own patina into the equation. Also having seen true REC 709 on a 6k unit, the colors are not as over saturated and the blacks do not appear crushed,here you are forced to look hard to discern low level detail (I saw this at the SIM2 and the Avielo booths). Seems to me for this to work will require transfers done at the same Cr.