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radian

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  1. radian
    How critical is it to avoid slightly oversize exit pupil? I just bought a GSO 250mm f/5 Dobsonian and a ES 52º 40mm eyepiece for it. It'll have 8mm exit pupil. Is this going to be an issue... or are there more severe issues with this scope-eyepiece combo? I wear glasses so a decent eye-relief is an issue.
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