Be more specific when you post here next time, this makes it easier for people to help you
Anyways by the title I think you want to reset the camera back to default, simply doing this will work:
— put this code where you want the camera to go back to normal
local player = game.Players.LocalPlayer
CameraF.CFrame = player.Character.HumanoidRootPart.CFrame — focus on player
CameraF.CameraType = Enum.CameraType.Custom — default camera rotation