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Hi Kevin (again) Not this time. There is an example in the EPs and Filters thread first posting which is why I pursued this line. I figured it was stopping the Sodium glow and I was now more interested in seeing how it affected exposure, colours and processing requirements.
This is through the Lunt 102 f7 ED and I'm happy with the CA so far, it seems manageable. I may try the 80 f11.3 Achro later just for comparison.
When I get the ZWO operational for DSO I'll also be trying that with a similar filter. I have a 1.25" non CCD Astronomik CLS filter to compare it with. I actually found combatting the blue effect of that harder but that was a while ago and my resources and skills have moved on a bit since then.
2" filters are expensinve $$$$ ! This is what led to these trials in the first place.
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