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Annie,
You viewed the Moon on a good night, too. I think it's roughly first quarter, so all the good craters are visible.
The ultimate test of a lens (or, binoculars) is focussing on point sources of light, which stars are.
The colour bleed you mentioned is likely chromatic aberration. This happens when a point source of light doesn't come to a single point of focus. Usually you will see red or blue fringing.
Good quality optics can account for this aberration. But, as with all quality items, they come with a price tag to match.
H
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