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    Advice need please re. eye strain with Monarch 7 8x30

    It can identify misalignment of the barrels. If misalignment is present, the blinking routine while focused on the telephone pole cross members should show two slightly overlapping images--one may be like a ghost image. Stars often stand out as double images too, if collimation is present. Lots...
  2. F

    Advice need please re. eye strain with Monarch 7 8x30

    Hi Sue, Regarding eyestrain, a very subtle binocular barrel misalignment may be taxing your eyes without your knowing. The method I use to determine whether this may be the case is to find a telephone pole with an upper cross-member maybe 200 yards away and focus the binoculars on the...
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