advice with NINA autofocus

[graham.hobart]

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

[tim.anderson]

Hi 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.

Regards

Tim

[ChrisV]

+1. That's what you want to see, a parabola

[graham.hobart]

cheers guys that is reassuring

[Geochron]

this is one from last night. Looks pretty similar to yours:thumbsup:

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