There are a number of users who have projectors pointed at 2:35:1 screens.
These screens are cheaply available in the US on amazon.com.
Since there are no projectors that actually project 2:35:1 (all are 16:9), users just move the projector closer or zoom the lens until the width of the picture covers the 2:35:1 screen from left to right.
This results in some "Spill" of the projected image above and below the 2:35:1 screen.
This is great for watching widescreen movies! The "Black Bars" from a typical movie end up above and below the screen because of the zoom, and you don't see them.
UNTIL THE MOVIE ENDS.
Then the DMS screens come back in 16:9 mode and the user interface gets projected above and below the screen.
Please consider an optional user interface in 2.4:1 widescreen mode to match the aspect ratio of many of the movies your customers have.
These screens are cheaply available in the US on amazon.com.
Since there are no projectors that actually project 2:35:1 (all are 16:9), users just move the projector closer or zoom the lens until the width of the picture covers the 2:35:1 screen from left to right.
This results in some "Spill" of the projected image above and below the 2:35:1 screen.
This is great for watching widescreen movies! The "Black Bars" from a typical movie end up above and below the screen because of the zoom, and you don't see them.
UNTIL THE MOVIE ENDS.
Then the DMS screens come back in 16:9 mode and the user interface gets projected above and below the screen.
Please consider an optional user interface in 2.4:1 widescreen mode to match the aspect ratio of many of the movies your customers have.