I have finished my lens install. I am very happy with the results. Resolution is clearly better. No more light spill above and below the screen. I have calculated a 22% gain in brightness vs zooming.
The lens I bought came with a Runco lens mount and slider. I had to fiddle with it a bit to have the slide mounted on the ceiling (It was designed to be mounted directly to a Runco projector).
I will post some pictures when I get back home.
Last edited by stef2; 01-11-2020 at 10:25 AM.