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  1. John A Roberts

    Bino Thoughts #3

    BB or not BB? While necessarily getting off topic, to clarify . . . A) Traditionally in the US context, a BB refers to a specific size of lead shot - a sphere - used in a shotgun cartridge US pellet sizes run from the smallest of #12 (0.05") to #1 (0.16”) and then B (0.17”), BB (0.18”), BBB...
  2. John A Roberts

    Bino Thoughts #3

    As a field expedient to placing an objective cap over one binocular barrel while focusing the other, as is shown in Bill's attachment to post #12: just lower the non-focus barrel around 1/2" (or around 15 mm), while keeping the focusing barrel aligned with the pupil of the other eye Since a...
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