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From the blogs, I heard the Ultima is the same as the Hyperion.
Have a 17mm Hyper. Works well on my f/6 refractor.
The Hyper is actually 2 ep in one, a 1.25 and a 2" with different focal.
By removing the bottom 1.25" barrel, it becomes a 2" ep with a longer focal...that's good value for your money.
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