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With today's coatings, the amount of glass wont hinder the views at all. I had a Speers Waler Zoom and it worked wonderfully. I only sold it because I wanted to get a Pentax 10mm XW , I was looking for a Pentax 10mm XW in the first place.
The field of view in the SW Zoom is huge!!!!....I saw incredible amounts of detail on Mars with this particular eyepiece!!!
I even put a GSO 2" barlow on it at the 5mm setting giving me 660x when I looked at the Eskimo Nebula in Gemini and the view was STILL crystal clear!!!!
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Mark
12" f/5 GSO Reflector
30mm 1rpd ,(soon)
14mm meade series 4000 UWA
10mm Pentax XW, (on the way)
2" GSO Barlow
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