Canon 12x36 IS III Image Stabilized Binoculars - Manual (Page 8)

ENG-7
Before You Start
4
Adjust the width of the binoculars.
Look through the binoculars and adjust the width until the left and right
images converge as shown above.
z
Doing the above minimizes eye fatigue during viewing.
z
When adjusting the width of the binoculars to suit the width between your eyes,
look at a distant object.
z
If you are wearing eyeglasses, fold back the eye cups.
5
Adjust the diopter.
First look through the left eyepiece
only and adjust the focusing knob until
the object looks sharp.
Then look through the right eyepiece
only and look at the same object while
turning the dioptric correction ring until
the object looks sharp.