Operation Manual
NIGHT VISION ATTACHMENT
NVS-33
105 Sparks Ave., Toronto, ON M2H 2S5, Canada
TABLE OF CONTENTS
1.1. Overview..................................................................4
1.2. Key features of NVS-33...........................................5
2. DESIGN of NVS-33 ................................................6
3. SPECIFICATIONS..................................................8
4. DELIVERY SET....................................................10
5. INSTALLATION ON A RIFLE............................12
5.1. Installation with thread usage ................................12
5.2. Installation with a riflescope mounting adapter
NC540....................................................................14
5.3. Installation on a Picatinny rail ...............................18
6. OPERATION INSTRUCTIONS ...........................21
6.1. Battery installation.................................................21
6.2. Testing NVS-33 in the daytime .............................23
6.3. Testing NVS-33 at night ........................................24
6.4. Testing NVS-33 at night with daytime scope ........24
6.5. Operation at night ..................................................25
6.6. Use in a dark time as a 2x night vision monocular 29
6.7. Operation with remote control ...............................30
7. STORAGE AND MAINTENANCE......................32
8. TROUBLESHOOTING.........................................34
9. WARRANTY.........................................................35
10. CUSTOMER SUPPORT .......................................37
11. ACCEPTANCE CERTIFICATE...........................38
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1. BRIEF DESCRIPTION
1.1.
Overview
NVS-33 is an afocal night vision attachment to a daytime
weapon scope designed for precise aiming in darkness.
The device is equipped with a high-quality generation 3
electro-optical image intensifier tube that amplifies light
in the visible and IR spectrum providing for up to a 400-
700 m effective observation range at low light.
Observation range depends on the characteristics of the
daytime scope NVS-33 is attached to and actual
observation conditions, such as available light,
atmosphere transparency and target reflectivity. The
observation range increases by brighter light, at moony
night, or if the object is positioned against a light
background, such as snow or grass. The range decreases
at lower light, low atmosphere transparency, or if the
object is positioned against dark background, such as
plough-land, desert, stems of trees, etc.
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4
1.2.
Key features of NVS-33
Installation of NVS-33 in front of a day scope on a
weapon does not affect the latter’s zeroing and
scope’s tactical parameters
Exit pupil fits a broad range of daytime scopes
Accurate internal focus adjustment mechanism
High quality image within the entire field of view
Withstands large calibre recoil
Optionally supplied with MIL-STD-1913 Weaver /
Picatinny mount
Mounting adapters fit a vast majority of the daytime
riflescopes.
Up to 1 meter of immersion waterproof design
Can be equipped with an optional powerful IR
Illuminator
Low battery indicator
Two possible types of batteries (AA and CR123) can
be used
Low power consumption
Compact and lightweight
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2. DESIGN of NVS-33
1
2
3
4 5
6
7
8
9
10
11
12
Fig.1 Configuration 1
1 – Ocular with light
suppressor
7 – Objective focus
adjustment knob
2 – Adapter ring with
thread
8 – Objective lens cover
3 – Fixating ring
9 – Battery compartment
cover
4 – Retention pin
5 – On/Off switch
10 – Battery compartment
11 – Remote switch
connector
6 – Device body
12 – Objective lens
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1
2
3
4
5
6
7
8
9
10
11
12 13
Fig .2 Configuration 2 (Special order with IR Illuminator)
1 – Ocular
8 – IR illuminator
2 – Adapter ring with
thread
9 – Objective lens cover
3 – Fixating ring
10 – Battery
compartment cap
4 – Retention pin
11 – Battery
compartment
5 – On/Off and IR switch
12 – Remote switch
connector
6 – Device body
7 – Objective focus
adjustment knob
13 – Objective lens
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3. SPECIFICATIONS
Optical
Magnification, x
Field of view, degrees
1
8.8
Daytime scope magnification,
x
1-20
3-12
Acceptable
Recommended
Focus length, mm
F-number
78
1.5
Focus range
10 m to infinity
N3XT3631IC
Gen. 3 18mm MCP
35,000
Image intensifier tube
Type
Gain, min
Resolution, lp/mm
Infrared illuminator (optional)
Type
57
IR diode
75
Power, mW
Illumination angle, degree
5-20
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Illumination wavelength, nm
Electrical parameters
Power supply
805
1 CR123 or 1 AA
battery
Voltage, V
3
Continuous work time, h, min
Mechanical characteristics
Dimensions, mm
60
180 x 75 x 60
615
Weight, g
Environmental conditions
Operating temperature range
Relative humidity
-50ºC to +55ºC
Up to 98%
IP67
Waterproof rating
NOTE: As the design is being continuously improved
some parameters may differ from those given above.
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4. DELIVERY SET
- NVS 33
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
1 pc.
- Objective lens cap
- Remote control switch
- Operator’s manual
- Ocular protective cap
- Soft case
- CR123 Battery
- Additional battery cap for AA battery
- Cleaning cloth
- Quick release Picatinny mount
- Light suppressor
- Riflescope mounting adapter
NC540.50
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Optional accessories:
- Hard case
1 pc.
- Riflescope mounting adapter
NC540.56, NC540.42
1 pc. of
each
- Threaded adapters M48, M52, M54,
M55
1 pc. of
each
- M540 converter to convert NVS33
into 2x monocular
1 pc. of
each
- IR illuminator (mounted on the
sight) (Configuration 2)
1 pc.
Exact delivery set depends on particular order.
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5. INSTALLATION ON A RIFLE
5.1.
Installation with thread usage
Your NVS-33 matches to the inner thread M52x0.75 of
the objective lens of those daytime riflescopes that can
accept daytime filters. If your scope does not match this
thread, use mechanical adapters that transform M52 into
M54, M55 or M48 threads. M52 adapter is used to
increase the depth of the thread in case if the scope
objective lens is close to the edge of the scope.
Mount your night vision attachment as follows:
If necessary, screw the corresponding threaded adapter in
the thread on the adapter ring (2) (Fig.1).
Loose the retention pin (4) by turning it counters
clockwise.
Turn the adapter ring (2) counter clockwise and screw it
into the inner thread of the daytime riflescope until stop.
Avoid applying extra strength while tightening.
1. Turn the night vision attachment NVS-33 so that the
objective focus adjustment knob (7) is located on top
2. Lock the attachment in this position by turning the
fixating ring (3) in the counter clockwise direction.
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The night vision attachment NVS-33 is ready for use.
NVS-33 can be screwed directly into the Newcon 3-
12x50 riflescope. Its design allows such mounting
without any additional adapters. To attach NVS-33 in
front of NC 3-12x50, proceed as described above
without using threaded adapters.
Due to different designs of the daytime riflescopes we
cannot guarantee that threaded connection is supported
in all cases. This design may be not strong enough to
hold the night vision attachment during shooting. In
such case, the ring and objective thread of the daytime
scope may be damaged.
The manufacturer is not responsible for use of NVS-33
night sight attachment by a threaded connection on
the scope models other than those, which were
approved by Newcon Optik.
There is no need to re-zero daytime scope or perform any
additional adjustment when NVS-33 is installed on the
rifle.
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5.2.
Installation with a riflescope mounting
adapter NC540
Three adapter modifications are available for the NVS-33
night vision attachment to install it in front of daytime
riflescopes of different models:
Adapter
Diameter of the
objective lens of the
daytime riflescope
Plastic inserts
set (quantity x
thickness)
NC540.56
NC540.50
NC540.42
56 mm
50mm
42 mm
1pc.х1mm,
2pc.х2mm
1pc.х1mm,
1pc.х2 mm
1pc.х1mm,
1pc.х2 mm
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1
4
5
6
7
3
2
Fig. 3
1. NVS-33 night vision attachment
2. Adapter ring
3. Fixing ring with the pin
4. NC540.50 (NC540.56, NC540.42) adapter
5. Adapter screw
6. Plastic inserts
7. Objective lens of a daytime riflescope
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Assemble the adapter and mount the night sight
attachment as follows (Fig. 3):
1. It’s necessary to select needed quantity of the plastic
inserts (6) for a particular external diameter of the
objective lens of the daytime riflescope. The
objective lens of the daytime riflescope (7) should fit
loose, but without apparent drift into the adapter (4)
with the installed inserts (6) and loosen adapter screw
(5).
2. After the inserts (6) are installed, the adapter (4) must
be screwed on the adapter ring (2) against the stop
and locked by the retention pin (3) in the counter
clockwise direction.
3. Put the night vision attachment with the fixed adapter
(4) on the objective lens of the daytime riflescope (7)
and fix it by the adapter screw (5).
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The lens of the daytime scope must be positioned at least
15 mm behind the front edge of the scope body. This
excludes mechanical contact of the NVS-33 night sight
attachment and daytime scope objective lens.
Last digits in the NC540 adapters part numbers correlate
with the diameter of the daytime riflescope. For example,
to use NVS33 with Swarovski Z6i 2-12x50 scope, you
should take the adapter NC540.50.
During shooting with the night vision riflescope
attachment NVS-33, which is attached to the daytime
riflescope with help of the adapter the adapter ring could
move along the objective lens of the daytime riflescope.
The size of this movement depends on the tightening
force of the adapter screw (5), recoil force of weapon,
etc., and could be equal to 1 mm on each shot. This
movement is allowed and do not affect on the impact
point. However, the position of the adapter should be
controlled after each shot in the shooting process.
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5.3. Installation on a Picatinny rail
The night vision attachment NVS-33 can be installed on a
Picatinny rail in front of the daytime riflescope. For this
purpose, it has an additional Picatinny rail on the side.
Night sight Picatinny rail
Fig. 4
The rail adapter is designed to make the night vision
attachment profile as low as possible to work together
with low-profile scopes.
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