[billdan (Bill)]

Originally Posted by rbronca

This is the best comparison I have seen. http://www.astrofotoblog.eu/?p=856#more-856
I had the MPCIII and have now moved to the GPU. The stars are now way better, but it is far less forgiving with tilt.

Thanks for that Rbronca, it was a good read and interesting results that was achieved.

There must be two versions of the Quattro going round, as this blog implies it needs 70mm distance to the chip.

" On the other hand TS quarto CC performs very badly. I would say that the stars are more deformed than in case without the corrector. The comets are flying outwards the center. One could say that it’s not coma corrector, but coma creator 🙂 And yes, I didn’t forget to use 15 mm spacer between the camera and the corrector, because back focal distance is 70 mm and not 55 mm as for every other CC. "


Bill