How to resize camera view port without changing what is on screen

I’m trying to create a split screen mode for a game, I use the normalised view port rectangle options to do it. The problem is that this also changes what actually is on screen, it cuts off the sides. Is there any way to make it squash what it can see to fit instead of cutting the parts off?

All I want is a camera which only takes up half the screen but shows the same as one that takes up the full screen.

I don’t think it’s possible until you’ll render camera to texture and display on plane. But that’s pro-only feature.