Vixen JOYFUL Series Instruction Manual

Figure 2
Figure 3
Figure 4
Model Magnification Objective
Aperture
MS8x21 8x 21mm
MS10x21 10x 21mm
Model Exit Pupil Brightness Eye Relief Near Focus
MS8x21 2.6mm 6.8
MS10x21 2.1mm 4.4
Calculated according to the standard JIS B7157:2003
The value specified in ( ) is calculated based on former standards.
PART NAMES
HOW TO USE
1. For diopter adjustment, try to find an
object in the distance. While looking
through the left eyepiece with the left
eye, focus on the object by turning
the focusing wheel. (Ref. Figure 2)
2. Then, while looking through the right
eyepiece with the right eye, focus on the
same object by turning the diopter ring.
It is advisable to remember the scale of
the diopter ring so that you can set the
diopter ring immediately without going
through the above procedure every time
you use the binoculars. (Ref. Figure 3)
3. Once both eyes are focused on the
object, you can focus on different
objects only with the focusing wheel.
(Ref. Figure 4)
Diopter Adjustment
This is for those who have different
eyesight in right and left eyes. The
diopter ring compensates for the
difference in the right and left eyesight.
SPECIFICATIONS
Prism Coatings Real Field Apparent Field
of View of View
BK7 MC 7 52.1 56
BK7 MC 6 55.3 60
Size Weight
H W D
10mm 3m 8.1 10.9 4.3cm 140g
7mm 3m 8.1 10.9 4.3cm 145g
MC
Multi-Coated(Objective and Ocular Lens)
INSTRUCTION MANUAL
Figure 1
Strap Eyelet
Figure 5
Strap Eyelet
Eyepiece Cover Cut Line
Strap
If you pull at a
strap, it can be
detached from the
strap eyelet.
Figure 6
Field
at 1000m
122m
105m
Tripod Adapter
Socket
JOYFUL Series
JOYFUL
MS8 21
MS10 21
HOW TO USE
1. While looking through the binoculars
with both eyes, adjust the interpupillary
distance by folding or unfolding the
body so that the field of view can be
seen as one circle. When doing this
adjustment, try to find an object in
the distance. (Ref. Figure 1)
Interpupillary Distance Adjustment
This is to adjust the distance between
the two eyepieces to fit your eyes.
Improper interpupillary distance may
result in eyestrain.
ATTACHING THE STRAPS
Attach the supplied strap to the strap
eyelet as illustrated. (Ref. Figure 5)
EYEPIECE COVER
On an eyepiece cover of the binoculars,
there is a strap eyelet with a cut line.
The cut line is provided for detaching
the strap easily. It is not a chap.
(Ref. Figure 6)