G'day - I have a refractor with an EAF and reducer (approx) 571 mmFL), with a ZWO Asi 585 osc. I am working through autofocus and got a U shaped curve last time- see attached. My back lash is set at 120 and step size 400. Can you help me get a better v curve?
Graham
The image you included doesn't show the y-axis scale, so it is difficult to estimate the sampling error.
However, I would hazard that the curve looks pretty good, and you are unlikely to improve your result except, perhaps, by fiddling with gain and exposure length.
