So what most people end up doing is purchasing a separate barlow so that their viewers will focus. Most barlows produce 2x the true magnification of the eyepiece. Schmidt-Cassengrain users can usually focus viewers without the use of a barlow because of their immense focusing ability. But with this particular barlow system your binoviewers will come to focus in your Newtonian and refractor, and the magnification will be 1.3, the true magnification of your eyepieces. This has been tested with a a great number of scopes including different Newtonian scopes in the f4 to f8 range, and refractors of all kinds, both excellent and cheap scopes alike, and all gave excellent performance.
Color is near perfect.
This also reduces the kidney bean effect associated with fast scopes, because it still does extend the focal distance of your scope some. This means that your rich field scope, when using your binos, can use much higher mm eyepieces with virtually no kidney beam effect. Also it will fully correct the image in you Newtonian right-side up and let to right. Now you will notice in the 3rd picture below, looking down the relay lens, you can see the 3 mirror hold downs, while in the 2nd picture, you can not see the hold downs. The reason for this is the relay barlow projects the image from the bottom elements to the top elements relaying the total surface of the mirror instead of cutting off about an inch all the way around the surface of the mirror.