If you used Skyrim mods, you might remember Dynavision. Well, it's also available for Fallout 4 and Xbox One at that.
When enabled, Dynavision provides the user with auto-focus and a depth of field effect you might get from a camera.
What this means is that objects you're looking at will stay in focus while stuff in the background will blur. It's a neat effect and particularly cool for those of us that like to share screen shots of the game.
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The photo here is an example of what you get from Dynavision and you can take a look at the full gallery right here. You can also take a look at the video below.