The F Number

The F Number = How many times you fold a paper x magnitude order of the thickness of the paper

The F Number Serie
F0 = 0.0001 (an unfolded paper)

F1 = 0.0002 (as thick as human hair)

F2 = 0.0004

F3 = 0.0008 (as thick as pencil lead)

TO BE CONTINUED