My Stellarvue finder seems equal to my Antares finder, maybe a hair better and much better optically than my GSO finder. I haven't tried it at high power. The idea of using nebula filters with it would be for wide field low power views of large nebula so I could see the whole thing, while viewing portions of them at higher power in my dob. So I was thinking of using a 16mm Nagler.
Don's scheme works but it's not ideal..
I have a 50 mm StellarVue finder. It's a good finder but I would not say the optical quality is all that high. Much better optically is the Astro-Tech 50mm RACI finder. I was able to split Porrima with mine. The StellarVue has issues at higher magnifications.
But the StellarVue is plenty good enough for a finder and is F/4 rather than F/5 and more compact than the Astro-Tech and provides a wider field of view with the same eyepiece.
Is this the AT finder of which you speak? https://www.astronom...-trim-3475.html
It's the only AT finder I can find on their site and it looks like it is on clearance.
Edited by Ihtegla Sar, 27 July 2021 - 03:35 AM.