Hi Benoit- have been a fan for years :-)? I certainly don't doubt your ability to build stuff! But supporting a fairly heavy secondary 200mm back will be a challenge to avoid vibration and maintain alignment. What would the diffraction limited field be at that distance? I too considered putting my corrector at the optimal distance - 1400mm- with a carbon fiber tube but decided against it. Is field curvature the only aberration with the corrector at about prime focus? The field curvature of a C14 is about the same as that of a 6"f/8 refractor (1/7th focal length vs 1/3rd). A field flattener for a 6" f/8 refractor should be pretty close it would seem.?
I just haven't tried that yet. Charles
