wiltw
Subscriber
But how close must you get to the eyepiece to see the complete screen?
If you have to bring your eye to it, a right-angle finder attached to any prism-finder should do the same and even be more versatile.
Eye needs to be right up to the eyepiece to see full screen.
Right angle finder would NOT MAGNIFY the image, not improving the ability to focus precisely with ground glass or see a split image focus aid match up under magnification.