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Hi Peter. Fred is just teasing you. Where we live the only filters that may of any real use would be a UHC which will give you a little better resolution of most nebulas but with the 10 inch you really don't need any. Borrow my UHC and see what you think. I also have a Ha but imaging with the Ha is really a monochrome exercise. I have one of these you can try also. Some of the others like a Hb is largely a visual filter and OIII and SII are for very narrow band imaging at very long exposures.
I tend not to use any of the filters for normal imaging but have dabbled with Ha and UHC but I am not overly impressed with the results. A thing to remember about Narrow band filters is the exposure times are doubled or more to get reasonable monochromatic images.
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