A very compelling reason to consider double stacking. Thankfully it can be done later.
Will the 60mm show much more than the 50mm?
Will the 60 have a bigger full disc image through the eyepiece than the 50?
There is a Lunt 60mm with a 12mm blocking filter in the classified - will that allow fir an image double the size of a scope with a 6mm blocking filter?
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