I have an 8-24 zoom, one of the WO clones. I use it in the PST only, and even then changing the FL means an annoying change of focus.
In the end, all it has done is convince me that I change focal lengths too often and too needlessly. I'd be better off with TWO premium fixed focal length EPs and to stick to just looking through each of them for longer. I'd get better quality observing done that way, without so much fiddling.
The question for me is: Which two?
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