Zoom eyepieces
In my experience, zoom eyepieces can be excellent, if they are high quality. I have a Baader Hyperion Mk3 zoom and rarely use anything else with my 12" Dob. The views it gives are as good as any of the Plossls and Orthoscopics I have in my collection. Not sure how it would compare with a Televue or other expensive eyepiece, but I am very satisfied. Some time ago I had a (cheap) Bushnell zoom, which was certainly inferior and hence little used.
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