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the cons of zoom ep is the small fov at the wide end (usually 40-50deg)
pro's are you can usually leave one ep in the focuser -& usually get good fields of view when using high magnification
i have recently bought a nikon spotting scope -the zoom ep is excellent (i am trying to get an adapter made for it)
if you are going to get one & use it a lot get either the badder zoom or WO premium zoom (also sold by orion)
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