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I have Pentax XW7 and several Morpheus including the 6.5mm.
The Pentax is optically quite perfect but the eye relief is not as good as the Morpheus and I think the XW has a slightly narrower FOV. Eye position is a bit sensitive in the Pentax and not at all in the Morpheus.
Both are top notch eyepieces but if I had to chose one I would take the Morpheus. Part of a good view is the ability to comfortably hold a view without image blackouts, kidney beaning etc. The Morpheus does that so you get a more enjoyable overall view. The Pentax though is a wonderful eyepiece.
5mm might be not so useful though. That is getting pretty high in magnification.9mm may be better and have a nice 2X barlow for those occasional nights of good seeing where the 5mm would give a good view.
Even a 9mm is around 155X magnification.
I prefer my APM 9mm XWA (100 degree eyepiece) to any other eyepiece I have. A fraction of the cost of a Televue Ethos with 90%+ of the performance.
Greg.
Last edited by gregbradley; 04-12-2021 at 09:25 AM.
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