Quote:
Originally Posted by peter_4059
The Ha is looking pretty good Rick.
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Thanks, Peter. Getting there!
Quote:
Originally Posted by Atmos
Out of curiosity, does the spacing matter if it is still able to focus?
The spacing I have with my QHY163M is close but not perfect and I am curious as to whether I should be trying to get it exact.
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There's a (thin) region where the field is flat and a region where you can get infinity focus. They overlap but they're not the same. But if you're getting good stars in the centre and corners at the same time I don't think there's any need to tweak further.