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I bought an O-III filter for my 200p a couple of years ago and it was certainly worth acquiring for stunning views of the Veil Nebula. It was a real "magic wand". I'm now thinking of a H-beta filter and I was wondering if it's going to be worth it. I see that some H-betas are recommended for CCD imaging use rather than visual. I see that the Astronomik H-beta filter is good for visual observation, with an 8" scope at the bottom of its suggested aperture range, but it is quite pricey. I would value any opinions positive or otherwise.