QHY9 - 1.25' filters and Vignetting
I have a QHY9 coupled to a Starlight Xpress wheel or to a TS drawer. I really want to switch from my 2'' Baader filters because I want to save money and get Astrodon narrowband.
Does anyone have any experience on the amount of vignetting I am expected to have? Can I get away with it or do I have to go to 36mm?
Thanks
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