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Levenhuk Monoculars

User Manual 

Eyepiece
Compass
Focus/diopter adjustment wheel
Objective lens
Strap mount

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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 flat image and are an ideal choice for people who like to travel, 
especially on the water, and often find 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:

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Compact and lightweight

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Fully multi-coated optics made of BaK-4 glass

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Waterproof shell (IPX7)

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Quick and precise diopter adjustment

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Comfortable twist-up eyecup

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Built-in compass for easy orienting

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Rangefinder 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: 

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

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

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Set the sharpness of the image by further turning the focus setting to the right or left. 

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. 

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Summary of Contents for NELSON Series

Page 1: ... compass for easy orienting Rangefinder 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 ...

Page 2: ...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 rangefinder scale To accurately use the rangefinder scale you will need to know either the size or distance of th...

Page 3: ...ve lens diameter aperture 35mm 1 38in 42mm 1 65in Compas and rangefinder built it Real field of view 7 5 7 Field of view 130m 1000m 427ft 1000yds 120m 1000m 394ft 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 10ft Diopter adjustment 4D Body plastic sealed nitrogen filled Waterproof class IPX7 protec...

Page 4: ...a special case We recommend keeping the silicate gel pack when included in the kit During long storage a thin white film may appear on the rubber armor You can wipe it clean with a clean napkin Levenhuk International Lifetime Warranty All Levenhuk telescopes microscopes binoculars and other optical products except for accessories carry a lifetime warranty against defects in materials and workmansh...

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