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    8x42 vs. 10x42 Binoculars

    The FOV is almost entirely due to the eyepiece, and type of eyepiece. The larger objective is really nothing to do with larger FOV. There is a Soviet 8x30 binocular with a 13 degree field of view. The 1944 submarine periscope eyepiece had a Koehler 120 degree eyepiece. A 12x42 has an...
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