Hi all,just wondering whether I can use a 2inch baader UV/IR cut filter as a internal
sub aperture ERF filter with a 90mm mod scope?Thanks,Nick.
2inchBaader UV/IR cut filter?
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Re: 2inchBaader UV/IR cut filter?
Nick,
I would recommend the Baader 35nm Ha as a better universal sub aperture ERF filter.
I would recommend the Baader 35nm Ha as a better universal sub aperture ERF filter.
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Re: 2inchBaader UV/IR cut filter?
I would avoid the Baader UV/IR. We used to offer it but it did not stop a polariser getting burnt behind it on a 100mm scope. The astronomik seems much better despite having a window in the calcium band. As Merlin66 says, a 35nm Ha is better still.