Marc, thanks for your explanations and images as well! When before I was talking about best images taken by the 42", I had in my mind just the ones you have attached: Saturn is without doubt one of the best taken from Earth. But when you have 1m Cassegrain on Pyrenees, some of the best imagers in the world, lead by professional astronomers, and add excellent seeing, what did you expect?
Rouzbeh, your paper is very interesting- I admit I ve missed it. Let me to return the favour attaching a pdf, written by J. Rösch, explaining the design and the construction of the Pic du Midi 1 meter telescope. Its in French, cannot find an english version unfortunately.
Vive le Pic !
That's a detailed paper, too bad my French is very poor. Not my paper
In general I haven't seen that kind of resolution from the Chilescope, not sure if its the location, bigger CO, or RC being more difficult to collimate perfectly? or a combination of all those.
I was initially thinking of getting a largish RC that could by a dual purpose instrument but didn't really see any great planetary images.
Even the 0.7m CDK scopes (sample Jupiter images on Planewave) look pretty disappointing from Thailand.
They both have massive secondaries.
On the other hand, Tiziano also from Thailand, gets beautiful images using a 0.5m planetary DK f/20.