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Halos are bad enough, but off-centre????
I would think that if I have a filter halo, it should be centred- but… as you can see here, it is not.
The ha image was taken with a WO 72mm refractor- does this mean the camera is tilted?
Image chain is:
Refractor doublet
Flattener
Spacers
OAG
Filter wheel
Asi2600mm
Any thoughts?
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