I went through the same thought process myself a month ago. I have an 8” Edge HD, Televue 127 and Televue 85 and have been wanting to try binoviewing for a while now. I decided that I would build my binoviewer set up around the SCT to start with because it would give me the most light and might be the easiest to start off with because of the shorter moment arm.
Even though an SCT can come to focus without a GPC they seem to be highly recommended here for best color correction so I started with the lowest power one, the 1.25, to maximize the field of view. I already had one 24mm Panoptic so I bought the second one because they seem to be one of the favorites for the wide field viewing.
I really like my 2” Baader prism diagonal for mono viewing so I decided I would get the Baader T2 prism diagonal for the binoviewer to minimize the light path. Note that a T2 diagonal will provide a much shorter light path, so wider field of view, than a 2” diagonal.
I then figured I needed a planetary high power pair, so looking to get about 200X with the GPC, I got a pair of 12.5 mm Morphei. After using them and the 24mm Panoptics I will decide if I need something in between.
I did get the Universal Alan Gee II Telecompressor just to see what kind of wider field I might get with that but I have not yet tried it.
Once I get that all working with the SCT, I will then see if the Televue 127 will come to focus with the 1.25 GPC and will then have to decide if I want to also use it with the binoviewer and if so what additional eyepieces and GPC, if any, I might then need. But I’m going to take it one step, one scope at a time.
Honestly, I am hoping that the Maxbright II on the 8” SCT give me all that I need from binoviewing. So far it has greatly exceeded my expectations!
Edited by swsantos, 28 July 2020 - 12:21 AM.