Magnify viewfinder for using as screen

[hap2001]

Hi.
I want to find a way to optically magnify EVFs, so I can use them as screens.
Upon searching, there are tons of lens that do the opposite - convert screens to EVFs, which is useless to me.
Any ideas?
Thanks.

[BeBuLamar]

All EVF's already have the optical magnifier (the eye piece).

[switchabl]

This is likely impractical. You could, of course, use a lens to project the EVF image onto a screen. But, as a result of the magnification, it would be too dim to be useful in most environments (and EVFs aren't usually very bright to start with).

You could conceivably build a very large (=very expensive) eye-piece with a high magnification that can be used at a distance. But unlike a screen it would have a very narrow viewing angle.

This trade-off is fundamental (energy conservation). There is no way to have magnification and preserve both brightness and viewing angle with a passive optical system.