|
I've been down this path many years ago....
Many diagonals were tested (prisms, silvered, dielectric)
To cut a long story short... the Astro-Physics 2" dielectric.... while many fell by the wayside......at about 1500x magnification (Sirius+ Barlows+ 4mm eyepiece.) could not be faulted....we simply were running out of light.
It's not cheap.
But it is effectively THE perfect diagonal.
|