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Hi Ben.
The Hyperion 8-24mm zoom eyepiece rates quite highly amongst zoom eyepieces. Good to very good, I would say.
But all zooms are fairly limited in the apparent field of view (around 50 deg AFOV) they provide compared to the many eyepieces that provide more than 60 deg and up to 100 or more degrees of AFOV. Some people love 80-100 deg and cannot live with less. Others are very happy at 50 deg. If you are using this eyepiece most of the time and enjoying it - great!
Yes, a 2.5mm eyepiece will be pushing your 10" dob past what the seeing conditions will allow you most nights. But on those special magic nights, it may well give you wonderful views of the Moon, Jupiter, Saturn and Mars. I don't recognise the brand, but I'm sure someone will.
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