Eden BINOCULARS Bedienungsanleitung Seite 5

2. Adjusting the interpupillary distance
The distance between both pupils varies from person to person. To adjust this
interpupillary distance, simply turn the two halves of the binoculars inwards or
outwards until a single perfect circle appears. This means that you should not see
dark patches or crescents on the edges or in the middle of the image. If you look
through the binoculars alternately with both eyes without moving the binoculars,
you should see a complete, round image with both eyes. In order to adjust the
interpupillary distance properly, you need to focus on an object reasonably far
away. This makes it easier to find the right setting.
  
Too wide Too narrow Correct
3. Adjusting dioptric correction
The dioptre correction is used to adjust the difference in the visual acuity of
a person' s eyes. For instance, if your left eye has a strength of -2 and your right
eye a strength of -4, the dioptre correction will compensate for these differences.
To adjust the dioptre, first 'unlock' the dioptric adjustment ring .
The adjustment ring is lubricated with special grease that hardens after a period
of time. This ensures that the ring cannot turn inappropriately. To loosen the ring
and allow it to turn smoothly, simply apply a little more force when turning the
ring.