I've spent the last couple of days pondering over this, I've used what I can find on the Wiki and the best I can get is a basic focus, however I am trying to get a smooth lock on like you would see in a fighting game. Any help would be very appreciated.
You dont need to set a part to that. I'm assuming your game isn't FE so you can use this
local player = game.Players:FindFirstChild'PLAYERNAME' if player and player.Character then --we need the character workspace.CurrentCamera.CameraSubject = player.Character end
You dont have to set the camera onto a part, you can simply set the CameraSubject to the person you want to spectate.
Hope this helped!