How to correleate densitometer reading with f-stops?
I have been working with E6 processing for a while now, and I've been trying to calibrate push processing timings. I'm hoping to base the calibration on E6 control strip readings. But I have one question - how does the densitometer reading relate to f-stop? For example, when the speed step is, say -0.1 units off the aim point - is it roughly 1/3 stop, or some x number of stops, slow? In another words, if I were to push process the control strip by +1 stop, how much deviation am I expected to see in the speed step - would it be -0.3 units from the aim point?
I would most appreciate some help or pointers in interpreting densitometer units.