Quote Originally Posted by Steve Smith View Post
Double the distance loses two stops as the light is now illuminating four times the original area.

The clue is in the title: Inverse Square Rule!

Yes, inded -- until you refocus. Then you should use an enlarging meter like the Ilford EM-10, calculate the exposure using a formula that includes the change in effective f/number due to focus change, or calculate a chart that instantly tells you the proper exposure compensation. Math is one of our allies, not our nemesis.