Quote:
Originally Posted by Craig_
It’s the rack and pinion focuser. I haven’t tried focusing without a filter entirely, this would not be easily done as each position in my EFW is occupied.
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The older crayford can tend to have a little free play as they age. You should be ok though with a rack and pinion.
With the ZWO EAF on the Asiair, make sure the focus process is completing with the focuser moving in (against gravity). Visually check to confirm, if it's not then use the "reverse" switch on the Asiair focuser setting page to fix.
You should find the best autofocus exposure times for each filter. This blog covers autofocus on the Asiair. It from last year but still relevant.
How to autofocus with asiair
In a previous post I suggested using no filter. Try setting up the autofocus for a Luminance filter (direction, exposure, and step size) and confirm the Bahtinov mask agrees. Then try another filter and find the correct exposure time for autofocus. Set it up one filter at a time.
Chris