Focal length in blender game engine?

I want to be able to use the focal length in blender game engine. It does not seem to work when i slide the slider that is supposedly used to increase/ decrease the focus range. I’m not sure what I’m doing wrong. Or if this is even possible, Thanks to anyone who helps…

focal length does work in the 2.7x versions.

theres two settings. one for viewport in the N panel, the other for the scene camera object, press numpad 0 to look through it

So your saying that making my game having blurred out views the farther you are away. Is not possible?

you’ll need a depth of field 2d filter, changing the focal length(or the f-stop) in the camera settings won’t blur stuff in-game.

Yeah, i see what your talking about. Thanks for the help!
It means a lot to me.