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Old 25-08-2018, 06:51 AM
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peter_4059 (Peter)
Big Scopes are Cool

peter_4059 is offline
 
Join Date: Jun 2007
Location: SE Tasmania
Posts: 4,532
Have you considered autofocusing using just the Lum filter and then applying filter offsets for the other filters? You can manually focus each filter using a Bahtinov mask to work out what offsets you need for your filters. That's how I have set up SGP and I think if you look on the SGP forum you will find this is quite a common approach for people using narrow band filters.
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