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Methane filter?
Hi all,
I keep my mind on having Chroma CH4 filter, but i also see Baader isn't a bad option as well, but i want anyone here to help me to answer my question.
ZWO, Baader and Chroma are all CH4 filters at 889mm, but, why they have different FWHM?
ZWO = 20nm
Baader = 8nm
Chroma = 18nm
This is the only filter that is left for my filter wheel, so i am trying to think about it as i may buy it on June or July depends on my situations, so from now i have to decide between the two, thickness doesn't matter because i will re focus always with different filters rather than LRGB anyway.
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