Calibrating your binoculars allows you to customize them to make up for the difference between your eyes. This will focus your binoculars for an optimal viewing experience.
 
  1.Stand 30ft (approximately 9.14 metres) away from a sign with clear lettering (street signs are ideal). urn the center focusing wheel counterclockwise as far as possible.
  2.Locate the diopter adjustment ring, a focusing ring located on one of the eyepieces (usually the right). It is usually marked with the following: - 0 +. Turn this ring as far counterclockwise as possible.
  3.Point the binoculars at the sign. Look through yourbinoculars with both eyes open. With your hand, cover the end of the barrel that has the diopter ring. Turn the central focusing wheel until the lettering on the sign comes into sharp focus.
  4.Cover the end of the opposite barrel. Turn the diopter ring until the lettering comes into sharp focus. Your binoculars are now calibrated to your eyes.