Hi, all. I'm considering a diagonal upgrade from a 2" Celestron #93215. Celeston's materials never listed a reflectivity for this diagonal - merely "high reflectivity" and fully multicoated (not XLT. Does anyone know the approximate reflectivity of these non-XLT diags.
I'm curious whether an upgrade to a dielectric or XLT would make a significantly noticable difference for purely visual observation.
Thanks for any info you can provide.