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Indeed, I would not like putting a full frame on a fast Newtonian; but my small refractor with its 3.2" FTF and 3.2" field corrector should handle it well at native f/6.
On the other hand, an f/3 10" Newton with its 750mm fl will result in exactly 1" pp with my QSI and a small chip should work well on a fast well built Newtonian. And f/3 means physically smaller instrument. F/3 also scares me, but if I venture this way why not go all the way? It would require a permanent setup for sure and excellent mechanics. I may still go conventional way with a larger refractor; a 130mm f/6.5 refractor would give about 0.9"pp with my QSI and albeit it would be slower than a fast Newt, but also MICH easier to handle
and it should give nice detail on galaxies.
Last edited by Slawomir; 18-09-2017 at 05:55 AM.
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