John
Tonight I hope to test out my new 2" NEB1 filter. It does similar things to a UHC, with subtle differences in the bandpass. I also have a Lumicon 1.25" UHC (a reason I wanted something slightly different). The NEB1 is from Sirius Optics (USA) and I purchased it from Andrews. It is cheaper than other filters as the coatings aren't laminated between two pieces of glass, rather the coatings are exposed on one side of the filter (the side that ends in the eyepiece when the filter is in place). Obviously much more care needs to be taken with these filters, but part of the idea is to improve the view by removing the extra glass.
I will get back to you with how it performed after tonight - fingers crossed
