Celestron 7x50 SkyMaster Pro ED Binoculars - Manual (Page 7)

ENGLISH I 7
TIP: If you wear eyeglasses for nearsightedness, you should wear them
when using binoculars. You may not be able to obtain focus at infinity
without them.
Whenever you begin using a new binocular
(or resume using a binocular after someone
else has been using it), ensure the diopter
compensation adjustment dial is set correctly
for your eyes. Once the dial is adjusted, you
will not need to adjust it again unless someone
changes the setting or unintentionally turns it
out of position.
To set the diopter compensation adjustment on
a SkyMaster Pro ED binocular:
1. Set the dial at the zero point by placing the
index mark on the diopter adjustment ring
opposite the zero or middle on the scale.
2. Use one of the binocular’s objective lens
covers to cover the right objective lens.
3. Select a distant stationary object such as a
tree or sign as your focusing target. Keeping
both eyes open, raise the binocular to your
eyes and center the selected focusing
target in the binocular’s field of view.
4. Still keeping both eyes open while viewing
the target, use the center focus dial to
bring the target into sharp focus in the left
eyepiece. Once the object is in focus, do not
SETTING THE DIOPTER