Celestron 10x42 Nature DX Binoculars (Black) - Manual (Page 6)

4 I ENGLISH
To ensure a crisp, sharp image, the focusing
system of the binocular must be set to
compensate for any differences in your
eyesight. This is achieved by setting the diopter
(located on the right eyepiece) before use. To
set the binocular to your eyesight, follow the
instructions below.
1. View an object in the distance through the
binocular.
2. Cover the right objective lens with your hand
or the objective lens cap.
3. Rotate the focus wheel until the image
viewed with your left eye is clear and sharp.
4. Cover the left objective lens with your hand or
objective lens cap.
5 . Viewing the same object, adjust the diopter
ring until the image viewed with your right eye
is clear and sharp.
6. Your binocular is now adjusted to your eyes
and focusing on any object can now be
achieved by simply turning the focus wheel.
TIP: Eyeglasses worn for nearsightedness should be worn when using
binoculars as you may not be able to obtain focus at infinity without
them.
Diopter
Adjustment Ring
Focus Wheel
Fig. 3
SETTING THE DIOPTER / FOCUSING