I'm looking at adding a filter slide to a custom Dob, with which I intend to use the TNVC/Tele Vue
afocal system, probably a slide from Astrocrumb:
They will make the slide to handle different numbers of filters. My thinking is that 4 places
would be enough for NV with wide/narrow Ha and maybe a couple of long pass filters,
but they e.g. could make a 6 or 8 place slide. I don't want to over-do it, but what
would you say would be a good number of filter places?