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As a first premium ep you want one that you are likely to be using the most.
The 10mm pentax is definitely a first buy as it will give you a 2mm exit pupil, perfect for general dso viewing, and will barlow well to give you a medium-high power planetary EP.
As for optical performance for a widefield, the 10mm XW is as good as it gets. If you want to spring for a 13mm ethos, thats also a fine choice.
Last edited by Starkler; 23-03-2008 at 01:43 PM.
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