I replaced the Riccardi reducer on my 10″.
It’s a new TS-Optics RC 0.8x Corrector Reducer for Ritchey Chretien telescopes.
All these changes are following the adaptation to the new camera QHY268M received last April.
This new reducer replaced the previous fantastic Riccardi reducer M63.
Basically due the previous reducer was not able to provide a good flat field to the current sensor, at any distance.
The new one corector is a massive piece of glass with M68 threads, now all my imaging train has migrated to M54.
Last night with only a millimetric set of M54 rings it was possible to test it at 82mm (16.9% curvature) and +- 1mm (circa 30%).
The initial results are so far so good and I am waiting for the new set of micrometric rings to do the fine adjustment with better seeing.
This is a Lum 60s frame with poor seeing and not perfect quiding….
More updates soon!!!