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I agree, I try to avoid zoom anything in optics, although zoom camera lenses and variable power rifle scopes have come an enormous distance in the last 20 years.
A zoom eyepiece will never be as good as a high quality native eyepiece optically. Another issue with zoom eyepieces is that as the power is reduced so is the AFOV which is the opposite to what happens with fixed focal length eyepieces. Some high quality variable power eyepieces (Televue) have addressed the reducing AFOV issue in recent years but I seriously doubt that a budget variable will adress it.
CS-John B
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