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Am I better off keeping the ED80 and add a PRIMA LUCE LAB ESATTO 2" ROBOTIC FOCUSER with adapter. Cost approx $1200. Is the image quality of a new scope any better than the 53glass in the ED80. I want to keep long focal length and may buy a 400mm scope for larger targets. Ideas appreciated as still very new to hobby but have to do something as 533 MC Pro will not hold focus due to weight.
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