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That Orion one seems to be what Lunt sell as their own zoom eyepiece for their solar telescopes. The Lunt one has a red ring under the eye cup, but apart from that they look the same and the specifications are the same.
From my reading on zoom eyepieces, the Baader Hyperion III is very good, and the Pentax and the Orion are a notch down. The rest are less satisfactory (apart from the Lieca which is around $1000).
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