Posted By Ed Blankenship
I just purchased Lumicon UHC and H-Beta filters to add to my collection: Lumicon O-III and the nice colored set that comes as part of the Celestron eyepiece kit.
My question is: "Having noticed that the UHC and H-Beta have external threads, but no internal threads, Is there a reason that these filters should never be stacked ?"
I know that the Lumicon filters are achieved with special coatings instead of (or in addition to) the optical glass substrate coloration (if any), but was wondering if I put the UHC into the diagonal or barlow and then put the O-III or the H-Beta downstream in the eyepiece, would I get a better rejection of unwanted light or would I create some odd "multiple reflection" senario like a Fabre-Porro (sp?)interferometer.
Another question, "Can I use the H-Beta filter with my full aperature solar filter to get some extra detail on the Hydrogen cell granularity (of the Sun's surface) like the cool, but expensive H-Alpha filters that come with the Energy Rejection Filters ?"
Any opinions and/or experience ?