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Old 10-01-2020, 10:50 AM
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HeavyT is offline
Join Date: May 2019
Location: South Australia
Posts: 46
Originally Posted by multiweb View Post
It's ok if your diffraction spikes look dotted as long as you can see the general pattern and center. Depending on the filters used and focal length and critical focus zone of your telescope the difference in focus between filters might not be big enough to notice visually. So no problem there.
Cheers mate, I'm at 765mm (900 x 0.85 reducer / flattener) using ZWO 36mm filters, 7nm.

Is it normal for Oxygen subs to look blurry even with a focused Bahtinov pattern?
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