The Nikon ACULON T51 binoculars offer a range of features to enhance your outdoor experiences. With its 8x magnification, you can get closer views of distant objects, while the 21mm objective lenses gather enough light to provide bright and clear images. The binoculars are also waterproof and fogproof, making them ideal for use in any weather conditions. Additionally, the turn-and-slide rubber eyecups allow for comfortable use with or without eyeglasses.
The Nikon ACULON T51 binoculars offer a range of features to enhance your outdoor experiences. With its 8x magnification, you can get closer views of distant objects, while the 21mm objective lenses gather enough light to provide bright and clear images. The binoculars are also waterproof and fogproof, making them ideal for use in any weather conditions. Additionally, the turn-and-slide rubber eyecups allow for comfortable use with or without eyeglasses.
Nomenclature
1m·
I
Please
refer
to
the
numbered images on page
4.
~
~
~
6
CD
Eyecup ITEMS SUPPLIED
® Neckstrap eyelet • Binoculars
® Focusing ring • Eyepiece cap
@ Objective lens
®Interpupillary
distance
® Diopter ring
• Objective lens caps
(j) 0 (zero)
diopter
position
® Diopter index
®Central
shaft
®Zoom
lever (8-18x42, 1 0-22x50 only)
Eyecups
• Soft
case
• Neckstrap
• Tripod adapter
TRA-2
(16x50, 1 0-22x50 only)
I
For
directions in which
to
turn
the
eyecups, please refer
to
the
image on page
4.
I
Turn and slide
type
(7x35/8x42/1
Ox42/7x50/1
Ox50/12x50/16x50)
• For eyeglass wearers, use eyecups in
the
fully retracted position.
•
For
non-eyeglass wearers, use eyecups in
the
fully
extended position.
Either way,
to
accurately adjust your view, you can use
two
click stops before reaching
the
fully
extended/
retracted position.
Fold back
type
(8-18x42/1
0-22x50)
•
For
eyeglass wearers, fold back
the
end
of
the
eyecups for
use.
•
For
non-eyeglass wearers,
do
not
fold back
the
end
of
the
eyecups.
Use
them
in
the
fully extended position.
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Neck
strap
and
caps
>
cluring
observation
I
Please
refer
to
images
A,
B,
C,
D,
a,
band
con
page
5.
I
Neck Strap
Attach the neck strap
as
illustrated
(A),
taking care
to
avoid twisting the strap.
Eyepiece cap
There
are
two
ways you
can
position the eyepiece cap
as
you observe your subject.
• Remove the eyepiece cap from the eyepieces and allow it
to
hang from the neck strap.
• Remove the eyepiece cap from the eyepieces, then detach the right strap from the cap and allow
it
to
hang
from the left neck strap.
(B)
To
attach/detach the eyepiece
cap,
pull the neck strap through the slits
as
shown in image
(C)
in
the
following order:
• Detaching: a
~
b
~
c
·Attaching:
c
~
b
~a
Objective lens caps
You
can
hook up the objective lens caps on the neckstrap during observation
to
avoid losing them.
(B)
Zoom lever
(8-18x42/1
0-22xSO only)
Magnification
can
be changed by moving the zoom lever.
When viewing the subject at a different magnification, first correctly adjust focusing at a higher magnification.
This minimizes blurring, which may occur when you change magnification.
Tripod
adapter
:
~rRA·l
Supplied accessory: 8-18x42/1 0-22x50
Sold separately (Optional): 7x35/8x42/1 Ox42/7x50/1 Ox50/12x50/16x50
When using a tripod adapter
TRA-2,
attach
it
to
the binoculars
as
illustrated
(D)
on page
5.
For
more information, please refer
to
the instruction manual for tripod adapter
TRA-2.
7
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8
Specifications
--
Type Porro prism central focusing
type
ACULON
A211
Model
I
7xso
··r
I
I 8-18x42
7x35 8x42 10x42 10x50 I 12x50 16x50 1 0-22x50
I
Magnification
(x)
7 8
10
7
10
I
12
16
8-18 10-22
Effective diameter
of
objective
35
42 42 50
50
I
50 50
42 50
lens (mm) t
--
Angular field
of
view (real) n
9.3
8.0 6.0 6.4
6.5
5.2
4.2 4.6** 3.8***
Angular field
of
view 59.3 58.4 55.3 42.7 59.2
57.2
60.8 35.6** 36.7***
(apparent) (0)*
Field
of
view 1,000m (m/ft.) 163/488 140/420 105/314 112/335 114/341 91/272 73/220 80/241
**
66/199***
Exit pupil (mm)
5.0
5.3
4.2
7.1
5.0
4.2
3.1
5.3** 5.0***
Brightness 25.0
28.1
17.6 50.4 25.0
I
17.6
9.6
28.1
**
25.0***
--
--
Eye
relief (mm) 11.8 12.0 11.6 17.6 11.8 11.5 12.6 1 0.3** 8.6***
Close focusing distance, 5.0/16.4 5.0/16.4 5.0/16.4 8.0/26.2 7.0/23.0 8.0/26.2 9.0/29.5 13.0/42.7 15.0/49.2
approx. (m/ft.)
Interpupillary distance 56-72 56-72 56-72 56-72 56-72 56-72 56-72 56-72 56-72
adjustment (mm)
Length (mm/in.) 118/4.6 145/5.7 145/5.7 180/7.1 179/7.0 179/7.0 179/7.0 163/6.4 197/7.8
Width (mm/in.) 185/7.3 185/7.3 185/7.3 197/7.8 197/7.8 197/7.8 197/7.8 185/7.3 197/7.8
Weight (g/oz.) 685/24.2 755/26.6 760/26.8 905/31.9 900/31.7 910/32.1 925/32.6 825/29.1 960/33.9
*Apparent
field
of
view
is
calculated based on
the
15014132-1:2002 standard, and obtained
by
the
following
formula:
[tan
w'
= r x
tanw]
Apparent field
of
view:
2w',
Magnification:
r,
Real
field
of
view: 2w
**When
minimum
magnification (8x)
is
selected
***When
minimum
magnification
(1
Ox)
is
selected
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• This
product
is
not
waterproof. Therefore, avoid
getting
it
wet
from rain, water splashes, etc.
•
To
keep your binoculars in excellent condition, Nikon Vision recommends regular servicing
by
an
authorized dealer.
• Specifications and design are subject
to
change
without
notice.
• No
reproduction
in any form
of
this "Instruction Manual," in
whole
or
in part (except for
brief
quotation
in critical articles or
reviews), may be made
without
written
authorization
from
NIKON
VISION
CO.,
LTD.
9
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4
English
CONTENTS
PRECAUTIONS
................................
....
4
SAFETY
PRECAUTIONS
....................
5
OPERATION
PRECAUTIONS
........
6-7
OPERATION
(Adjusting
interpupillary distance and
diopter
adjustment)
......
.
..............................
8-9
PRECAUTIONS
Thank you for purchasing a Nikon
binocular.
Strictly observe the following
guidelines in order to
use
the
equipment properly and avoid
potentially dangerous accidents
G)
Before using
the
product,
thoroughly
read
the
"SAFETY
PRECAUTIONS"
and the
instructions accompanying
the
product
on correct
use.
®Keep these instructions
within
easy reach for reference.
®Some
of
the
"SAFETY
PRECAUTIONS';
"OPERATION
PRECAUTIONS"
and
"OPERATION"
described here may
not
refer
to
the
product
you purchased.
In
order
to
protect you and
third
parties from possible
injury
and/
or
property
damage or
loss,
you
are kindly requested
to
pay close
attention
to
all instructions, warnings
and cautions regarding
the
use and
care
of
this product.
~WARNING
This indication alerts you
to
the
fact
that
any
improper
use
ignoring
the
contents described herein can result
in potential death or serious injury.
~CAUTION
This indication alerts you
to
the
fact
that
any
improper
use
ignoring
the
contents described herein can result
in potential
injury
or
may cause only
physical damage.
OPERATION
PRECAUTIONS
The items contained in this section
alert you
to
the
fact
that
any
improper
use
ignoring
the
contents
described herein may negatively
affect
product
performance and
functionality.
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'SAfETY
..
tl
i
RECAUTIONS
Lh
WARNING!
Lh
CAUTION!
Fig. 4
[Z
Never look at the sun directly
•
If
you
use
the
rubber eyecups for
~
a long period
of
time, you may
~
while using binoculars/
suffer skin inflammation.
If
you
~
monocular.
develop any symptoms, stop
use
Doing
so
may seriously damage
the
and consult a
doctor
immediately.
eyes.
(Fig.
1)
Fig. 1
.
Be
careful
not
to
pinch your finger
when adjusting interpupillary
Lh
CAUTION!
distance or diopter.
Be
particularly
• Do
not
leave
the
binoculars/ careful
if
you let small children
monocular in
an
unstable place.
use
the
binoculars.
(Fig.
4)
They may fall and cause injury. • Do
not
leave the polyethylene
• Do
not
look
through
the
bag used for packaging
within
binoculars/monocular while small children's reach. Children
walking.
You
may walk
into
may
put
it
on their mouths and
unexpected objects and
get
hurt. suffocate.
(Fig.
5)
(Fig.
2)
Be
careful
that
small children
do
• Do
not
swing
the
binoculars/
not
inadvertently swallow the
monocular by
their
straps. They cap
or
eyecup. If
it
does happen,
may
hit
someone and cause injury. consult a
doctor
immediately.
(Fig.
3)
• Do
not
disassemble
the
• The soft
case,
strap, and external binoculars/monocular. Repair
materials utilized on binoculars/ should be referred
to
a Nikon-
monocular and rubber eyecups authorized service representative.
may deteriorate due
to
aging
(Fig.
6)
and stain clothes.
To
prevent this,
check
their
condition before each
use,
and consult
with
a Nikon-
authorized service representative
Fig. 6
if
such deterioration
is
found. 5
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OPERATION
PRECAUTIONS
[I
OPERATION
AND
CONTROLS Fig. 7 STORAGE
~
1 . Do
not
open
the
right
and left binocular 5. Water condensation or mold may
§]
tubes beyond their limits. Also be careful occur on lens surfaces because
of
not
to
rotate the
diopter
ring, focusing high humidity. Therefore, store
the
~ ring and zoom lever (ring) beyond their binoculars/monocular in a cool,
dry
limits.
(Fig.
7)
place. After use on a rainy day
or
at
2. Avoid rain, water splashes, sand and night,
thoroughly
dry
them
at room
mud.
(Fig.
8)
With waterproof/water- temperature, then store in a cool,
dry
resistant binoculars,
though
some place.
rain or water splash will
do
no harm, 6. For long term storage, keep binoculars/
wipe
the water
off
as
soon
as
possible. Fig. 8 monocular in a plastic bag
or
an
To
confirm
if
your binoculars are
airtight
container
with
a desiccant.
If
waterproof/water-resistant or not, check this
is
not
possible, store in a clean,
the instruction manual
of
the
product
well-ventilated place, separate from
you purchased.
the
case,
as
they
are easily affected by
3. Always protect binoculars/monocular moisture.
(Fig.
1
0)
from shock.
If
you cannot obtain
7.
Do
not
leave
the
binoculars/monocular
a normal image after
dropping
or
in a car on a
hot
or sunny day, or near
getting
the binoculars/monocular wet, heat generating equipment. This may
take
them
immediately
to
a Nikon- damage or negatively affect them.
authorized service representative
(Fig.
9)
Fig. 9
(Fig.
11)
4. When exposed
to
sudden temperature
changes, water condensation may occur \
on lens surfaces.
In
this
case,
thoroughly
dry
the binoculars/ monocular at room
temperature.
6
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Fig. 10
MAINTENANCE
&
STORAGE
8.
Remove
dust
trapped in
the
focusing
unit,
diopter
adjustment unit,
or
other
rotating parts
with
a soft brush.
(Fig.
12)
9.
After having removed dust
with
a
blower, clean
the
body
surface using
a soft, clean cloth. After use at
the
seaside,
lightly
soak a soft, clean cloth
with
water and
wipe
off
salt
that
may
be on
the
body
surface. Then
wipe
the
body
surface
with
a
dry
cloth. Do
not
use benzene, thinner, or
other
organic
solvent.
(Fig.
13)
10.
When removing dust on
the
lens
surface, use a soft oil-free brush.
11.
When removing stains or smudges
like fingerprints from
the
lens surfaces,
wipe
the
lenses very
gently
with
a
soft clean
cotton
cloth.
Use
a small
quantity
of
pure alcohol (ethanol)
or
lens cleaner available in stores
to
wipe
stubborn smudges, from
the
center
of
the
lens
to
the
outside in a circular
motion. Do
not
use anything hard
as
it
may scratch
the
lens surface.
(Fig.
14)
Fig.
12
Fig.
13
Fig. 14
7
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OPERATION (Adjusting interpupillary distance and diopter adjustment)
II
Adjusting interpupillary distance
~
Match the distance between
right
and left eyepiece
[!!]
tubes
with
your interpupillary distance by moving the
tubes apart or closer together.
§]
8
--
/
~
f
~
i
\\
--
·-
-.l
__
_
:.
I
',
__
_
___
-
--
___
_
____
_
...
/
Merge
the
two
circular viewfields
into
one.
Diopter adjustment
(Balancing
right
and left eyesight)
*
With the focus correctly adjusted,
remember
the
diopter
index position
for easier future
diopter
adjustment.
* For focusing
with
the
diopter
adjustment ring or focusing ring,
rotate counterclockwise
to
focus on
a nearby subject, or clockwise for a
distant subject.
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CF:
Central focusing binoculars
Binoculars
with
the
diopter
adjustment ring on the right
eyepiece.
CD
Rotate
the
focusing ring until you
obtain a sharp image
of
your subject
in
the
left eyepiece.
® Rotate
the
diopter
adjustment ring
of
the
right
eyepiece until you obtain
a sharp image
of
the
same subject in
the
right
eyepiece.
@ Check focusing on
both
eyes.
@ When you view a different subject,
adjust
the
focusing ring until you
obtain a sharp image.
Binoculars
with
the
diopter
adjustment
ring on the left eyepiece (some models
of
zoom binoculars).
CD
Set
the
zoom lever at
the
maximum magnification position.
® Rotate
the
focusing ring until you obtain a sharp
image
of
your subject in
the
right
eyepiece.
@ Rotate
the
diopter
adjustment ring
of
the
left
eyepiece until you obtain a sharp image
of
the
same subject in
the
left eyepiece.
@ Check focusing on
both
eyes.
® When you view a different subject, adjust
the
focusing ring until you obtain a sharp image.
IF: Individual focusing binoculars
For
individual focusing binoculars,
diopter
adjustment
is
basically
unnecessary.
CD
Focus
right
and left
eyes
separately.
® When
the
subject changes, focus
with
both
eyes separately.
Note: For
zoom
binoculars
When viewing the subject at
a different magnification, first
correctly adjust focusing at a higher
magnification. This minimizes
blurring, which may occur when you
change magnification.
*
If
you change
the
magnification from
low
to
high after adjusting focusing
at
low
magnification, serious image
blurring may occur.
9
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Nikon ACULON T51 Owner's manual
- Type
- Owner's manual
- This manual is also suitable for
The Nikon ACULON T51 binoculars offer a range of features to enhance your outdoor experiences. With its 8x magnification, you can get closer views of distant objects, while the 21mm objective lenses gather enough light to provide bright and clear images. The binoculars are also waterproof and fogproof, making them ideal for use in any weather conditions. Additionally, the turn-and-slide rubber eyecups allow for comfortable use with or without eyeglasses.
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