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Widefield eyepiecean eyepiece with an achromatic doublet lens designed in such a way that it does not have to be limited to viewing only in its center, and the portion of the lens that allows non-distorted viewing is l [..]
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Widefield eyepiecean eyepiece with an achromatic doublet lens designed in such a way that itdoes not have to be limited to viewing only in its center, and the portion of the lens that allows non-distorted viewing is la [..]
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