F/Stop Difference

F/Stop Difference.

There is basically 3 types of F/stops, Whole Stops, 3rd Stops, and Half Stops. F/Stops are based on the Power of the Square Root of 2. which is rounded to 1.4

There is a formula to calculate the difference between F/Stops.
The formula is
( log(fstp1) - (log(fstp2) ) / (log(sqrt(2) )

I've made a simple java applet to help calculate the difference.