1) First you said N22 cannot be fully illuminated.
2)How the heck you want to know, he used cheap mirrors?
3)How do you want to know, the wide field eps cannot be used?
1) I always said that it is no problem to fully illuminate the N22 and the Pano 27 even with the poor Binoptic triple mirror design.
Read my postings carefully and stop spreading lies
2) I definitively know that Binoptic never had special mirrors made for his scopes.
He bought mirrors which were intended for star diagonal at the available market.
I do not say they are cheap or of bad optical quality, but they were never sized to pull out the optimum regarding eyepiece illumination. They were just available standard sizes
When you are ordering a set of EMS from Tatsuro he is asking your aperture, focal length and the eyepieces you are intending to use with this system.
Then he is calculating the mirror sizes and housings needed to provide maximal performance.
How can you think ignoring all these specs could provide the same quality?
3) Because I have calculated it and I did draw the light cones when I was planning my 125mm Borg binoscope.
First I also had a triple mirror design in mind, because it is cheap and easy to build.
But I saw, that it is very limited regarding fully illumination of long focal length wide angle eyepieces and as this was my main intention for this scope.
So I had to switch to a way more expensive twin mirror design.
You are showing up the same discussion style than in the german forums since years :-(
You do not even understand the basics of optical geometry, light pathes and cones and always proclaim your expectations as facts.
Now I am out, feeding trolls like you is just wasting time
It is all said, everyone can make up his own mind.