The 180mm Mak certainly lives up to its reputation as a planet killer, its nice to be able to get good detail without using barlows or tiny fl eyepieces. I did try to push the Mak to the max on Jupiter with the asi120mc, but I think that one of those rare super seeing nights will be needed to get a good result. The things we to for an astro fix when the weather is not the best.
Jupiter @ 13,500mm fl at f75 (2700mm + 5x barlow)
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