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  1. elkcub

    blackouts at AFOV of greater than 60 degrees- why

    Pat, Please read the section entitled "Spherical Aberration of the Exit Pupil" at the end of this article. "Spherical aberration of the exit pupil almost exclusively afflicts eyepiece designs with fields larger than 60° — wide angle or super wide angle eyepieces. Given the limitations of the...
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