Levenhuk Nelson 7x35 Handleiding

Levenhuk Verrekijker Nelson 7x35

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Levenhuk Monoculars

User Manual

Eyepiece

Compass

Focus/diopter adjustment wheel

Objective lens

Strap mount

Caution! Never look directly at the Sun through this device, as this may cause permanent eye damage and even blindness.

Reliable and sturdy, Levenhuk Nelson marine monoculars produce a perfect at image and are an ideal choice for people who like to travel,

especially on the water, and oen nd themselves in extreme weather situations and harsh conditions. The rugged shell protects the intricate

optical system inside from any sudden impact or moisture, and withstands poor weather conditions, rain and sea waves. Features:

Features:

• Compact and lightweight

• Fully multi-coated optics made of BaK-4 glass

• Waterproof shell (IPX7)

• Quick and precise diopter adjustment

• Comfortable twist-up eyecup

• Built-in compass for easy orienting

• Rangender scale for convenient measuring of the observed object’s size or distance to the object

The kit includes: monocular, objective lens cap, strap, pouch, optics cleaning wipe, user manual and warranty.

Focusing and diopter adjustment

Follow this procedure to adjust focus and diopter setting:

• Set the focus/diopter adjustment wheel to its original position (the white mark on the wheel should be opposite the value “0”).

• Look through your monocular on an object located at a distance of about 100m from you.

• Set the sharpness of the image by further turning the focus setting to the right or le.

From time to time, you will have to refocus the lens, so remember the setup process for future use.

Using eyecup

We recommend setting the eyepiece in the lowest position for observations while wearing eyeglasses. Turn the eyecup upward in a spiral (for

upper position); turn the eyecup downward in a spiral (for lower position).

Do not apply excessive pressure as this may damage the eyecup.

Using the compass

Your monocular is equipped with a directional compass. If you look into the eyepiece, you will see a scale in degrees (350…360…) at the lower

edge of your eld of view. The directional compass show orientations it terns of angles, where the North is represented as 360°, East as 90°,

South as 180° and West as 270°.

Having the object centered with the rangender scale in the eld of view, read the graduation. The orientation of the object can be identied

from the reading.

Note: The north indicated the directional compass is “magnetic north”, which is dierent from ”true north”. The rue north is the same no matter

where you are located around the world. The magnetic north varies on your location.

By using the monocular, together with a map and an angle meter, you will then be able to precisely nd your location.

Example: On a boat sailing, the arrow shows the direction your boat is heading for (g. 1).

In Fig. 2, by reading the compass in the monocular, you read 190° from the boat to the buoy. (The counter-directional angle, 190°–180°=10°,

from the buoy to the boat.) To locale your position precisely, you need to have a second reference. In Fig. 3. by using the lighthouse as the

second reference, the direction from the lighthouse to the boat is 120° (300°–180°=120°) and the buoy (10°).

Reading the rangender scale

To accurately use the rangender scale, you will need to know either the size or distance of the object.

For monoculars Nelson, you can use formulas to calculate the distance to the object (when you know its size) or the object’s size (when you

know the distance).

When you know the object’s size (in centimeters), calculate the distance to the object (in meters):

Example: Object size (you know) is 81cm, rangender scale reading is 2.4 units. Calculate the distance to the object:

When you know the object’s size (in centimeters), calculate the distance to the object (in meters):

Example: Distance (you know) is 3000m rangernder scale reading is 1.7 units. Calculate the object height:

Lighthouse Lighthouse Lighthouse

N N N

Buoy Buoy Buoy

Boat

120°

300°

190°

190° 10°

Fig. 1 Fig. 2 Fig. 3

Distance = rangender scale reading

(100 × size)

Size = 100

distance × rangender sale reading

= 3375m

2.4

100 × 81cm

= 51cm

100

3000m × 1.7

Specications

The manufacturer reserves the right to make changes to the product range and specications without prior notice.

Nelson 7×35 Nelson 8×42

Optics material ВаК–4

Optics coating fully multi-coated

Eyepieces 2 elements in 1 group

Objectives 3 elements in 2 groups

Magnication 7x 8x

Objective lens diameter (aperture) 35mm

1.38in

42mm

1.65in

Compas and rangender built-it

Real eld of view 7.5° 7°

Field of view 130m/1000m

427/1000yds

120m/1000m

394/1000yds

Relative brightness 25 27.56

Twilight factor 15.65 18.33

Exit pupil diameter 5mm

0.2in

5.25mm

0.21in

Eye relief 23mm

0.9in

Close focus 3m

10

Diopter adjustment ±4D

Body plastic, sealed, nitrogen-lled

Waterproof class IPX7, protection against temporary immersion in water

Eyecups twist-up

Operating temperature range –20…+55 °С

–4…+131 °F

Product specificaties

Merk:	Levenhuk
Categorie:	Verrekijker
Model:	Nelson 7x35
Kleur van het product:	Grijs
Gewicht:	- g
Breedte:	- mm
Diepte:	- mm
Hoogte:	- mm
Gewicht verpakking:	415 g
Breedte verpakking:	90 mm
Diepte verpakking:	180 mm
Hoogte verpakking:	70 mm
Gebruiksaanwijzing:	Ja
Helderheid:	25 cd/m²
Waterdicht:	Ja
Opbergetui:	Ja
Dichtstbijzijnde focus afstand:	3 m
Prisma type:	BaK-4
Vergroting:	7 x
Objective diameter:	35 mm
Exit pupil:	5 mm
Gezichtsveld (op 1000 m):	130 m
Oogafstand:	23 mm
Blijkbare gezichtsveld:	7.5 °
Schemer factor:	15.65
Schoonmaakdoekje:	Ja
Lens-bedekking:	Fully Multi Coated (FMC)
Lensdop inbegrepen:	Ja
Bedrijfstemperatuur (T-T):	-20 - 55 °C