I generally have reasonable focus although at times it could be better. In the process of trying a few things I noticed that when I get the message that the HFR of X may be higher than Y after an autofocus run, if I jog the focuser by the set step size in the autofocus dialogue box (mine is set at 75) the stars will be very tight and good focus is achieved.
While researching this last night it was suggested that it might pay to set the data points higher which I tried and then my V curves showed dog ears as the focuser moved further away from the CFZ, resulting in very poor focus.
Do I need to change the step size when I change the data points and does the star size need to be changed also?
Appreciate any suggestions, thanks.