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I've read various posts saying you can use a #25 or #26 filter plus a UV-IR cut filter and they do the same thing as an ERF.
Before I buy some and put my eye to the eyepiece, I wouldn't mind some confirmation.
That said, even if I didn't trust them enough to put my eye to it, would they be good for use in an imaging setup?
Cheers,
Jason.
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