Adjusting the Interpupillary Distance
The interpupillary distance, the distance
between pupils, varies from person to
person. The binocular must be correctly
aligned (adjusted) to the distance between
your pupils to achieve a single, clear image.
To adjust this distance, lift the binocular up
to your eyes (using both hands) and look
through them at a distant object. Move the
two barrels (halves) of the binocular closer
together or further apart until you see a
single, clear image. Check that the
interpupillary distance is set correctly
every time you use your binocular.
3
Fig. 2
