I have an edge hd 800. Even if I try to collimate the scope with reducer perfectly, I see color dependent distortions at the edges (i.e. different filters show different star shapes). Without the reducer, this is not the case and it is not a problem of the filters, since my refractor does not show this.
So I wonder what the reducer does to the edge hd optically?
Since there are people here who have put their telescopes into interferometers, I wonder whether there are people here who have tested the scts with reducer and can tell what it does to the optics, and whether there are ways to optimize image quality in the field (different corrector rotation, different distances, different focus positions for the filters etc.).
Edited by Benni123456, 22 August 2019 - 01:42 PM.