Ok so here is a portion of what you sent me.
Let me run through this to be sure I have it right.
I understand that I am supposed to get it as focused with my bahtinov mask as I can and then remove it and take a frame. In the tutorial he got .90 HFR and so you wrote that down.
It then says to start looping and move your focuser out until the HFR gets to 3 to 5 times greater than the number your wrote down which in this case was 4.89
At this point it says to do this.
Subtract the "in-focus" focuser position from the new (current) focuser position. Multiply this number by 2, divide it by the number of "Auto Focus Data Points" minus 1 and you now have a good "Step Size".
I get that I'm supposed to take the In-Focus number and subtract it from the new position etc.
But I am unclear on what the "Auto Focus Data Points" are.
What are those? I think once I understand that I should be able to put this into practice and try it.
Thanks for your patience