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The APT per filter auto focus seemed to run okay for all 7 filters, but blue and green seem a bit out. Can anyone suggest optimal settings to find best relative focus - I tried 12 steps but I wonder if there is a better method.
One my first attempt it gave
Luminance : 0
Red : -25
Green : -5
Blue : -45
Hydrogen Alpha : -59
Oxygen II : -58
Sulphur III : -136
I am surprised that Green and Blue are that relative distance - given as a function of wavelenght of light I would expect it to follow the order of a rainbow Red, Orange, Green, Yellow, Blue, Indigo and Violet - so I would have expected the Green Value to be between the Red and Blue values.
But in DeepSkyStacker I can see tiny doughnuts instead of tight stars when I zoom in on the Blue and Green shots - whereas the Red and Luminance ones are tight. So I am wondering if the Autofocus per filter went a bit wrong on my first attempt...
Last edited by g__day; 21-05-2023 at 02:40 PM.
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