Originally Posted by fight4yu
Kelvin.. can you elaborate more on this? I plan to do zoom, and I had a Lumagen XD. I thought I would be using lens memory on the JVC to go back and forth between 16:9 and 2.35:1... Seems like you say there is a better way to do so?
Say I have a scope screen, and I zoom it in such that the black bars fall outside the screen.. For that, i assume I will have to set the Lumagen to 16:9 screen aspect ratio, because I am "technically" using a 16:9 screen but I just ignore the black bars... Now, what buttons/setting that will allow me to go back to 16:9 format without lens memory on JVC? Many thanks.
It's not technically 'better' because you end up with 16:9 displayed at approx 1400 x 800 resolution, but the point is that it's instant.
It's done by setting up two otherwise identical memories on the Lumagen both using 16:9 aspect. You change AR by selecting one of these two memories (a single button press, no menus to navigate and completely instant with no on screen notices). One memory (for example 'mem A') is just the standard 1:1 pixel mapped (assuming it's a 1080 input) the other (' mem B' in this example) has the 16:9 setting adjusted to 'shrink' the active image down to approx 1400 x 800: If you imagine a 16:9 image surrounded on all four sides with black bars.
With the projector already zoomed for 2.35:1 to fill the width of the 2.35:1 screen you select AR by chosing mem A for the main 2.35:1 feature and mem B for the 'shrunk' 16:9 setting for menus and trailers.
Using mem B, the black bars spill off the top and bottom of the screen, but you also have side bars too. The 16:9 image fits within the height of the 2.35:1 screen, just at lower resolution. When you then change to mem A the 2.35:1 image's top and bottom black bars still spill over the top and bottom of the screen, but the image now fills the width of the screen perfectly (normal 2.35:1 zooming like you'd get without the Lumagen in place).
It saves needlessly zooming in and out for menus, etc then when you start the film itself, so it's less intrusive, if the film is 2.35:1. You use the 'shrunk' memory for the menus and trailers and then select the 1:1 mapped one as the main film starts. If you are going to watch a 16:9 film (likely 1.85:1) then this is where you would use the zoom memory and use the 1:1 pixel mapped mem A memory on the Lumagen (no point wasting resolution for a whole film, though some do this).
It's one of those things that's harder to explain than it is to show someone.