Proper FOV for 16:9 screen?

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Yeah, after I looked at it awhile field of view in this game is just a zoomed in and out camera. In most games I've played it changes how far left and right you can see so the screen doesn't appear stretched. The screen appears a bit stretched to me in this game. I have correct aspect ratio. I'm guessing its just the way the game is. Thanks for the help though. :)