BRESSER 1866840 Nautic 7×50 Gen II Marine Binoculars Instruction Manual

: June 5, 2024
: BRESSER

Table of Contents

Intended use
Parts overview (Fig. 1)
Graticule and scale (Fig. 2)
Inter pupillary adjustment
Rubber eyecups
Focusing
How to use the Mils Reticle to estimate distance
- What is the View Angel
How to use the compass
Changing the batteries
Storage and maintenance
General maintenance
Cleaning
Disposal
EC Declaration of Conformity
Contact Us:
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

BRESSER 1866840 Nautic 7×50 Gen II Marine Binoculars Instruction Manual

GENERAL WARNINGS!

Risk of blindness!
Never use this device to look directly at the sun or in the direct proximity of the sun. Doing so may result in serious eye damage or complete blindness!

Risk of fire!
Do not place the device, particularly the lenses, in direct sunlight. Light concentration could cause a fire.
Risk of material damage!

Do not expose the device to high temperatures!
Do not leave the binoculars in a car under hot weather conditions nor
place it near a heating.
Do not disassemble the device!

Intended use

This device is intended only for private use. Respect the privacy of other people. Do not use these binoculars to look into apartments, for example.

Parts overview (Fig. 1)

Rubber eyecups
Eyepieces/Ocular systems
Diopter adjustment rings with index marks (each graduation = 1 diopter)
Inter pupillary scale
Compass and reticule
Graticule illuminator on/off switch
Housing with Porto prism assembly inside
Battery compartment
Tripod adapter thread
Objective lenses

Graticule and scale (Fig. 2)

There are vertical and horizontal lines on the graticule (Fig. 2). Each small division on both vertical and horizontal lines represents 5 mils and each numbered division represents 10 mils (one perigon=6400 mils). So,“10” on the scale is equal to 10 mils.

Inter pupillary adjustment

First adjust the binoculars so that both eyepieces are directly in front of your eyes. This is done by holding the binoculars with both hands and bending the main binocular body housing until you can see one single circular image.

Note!
The image will not be clear and sharp at first. You will adjust for clarity in the next step. You must first set the binocular’s inter pupillary distance to fit your eyes. The setting for your eyes will be indicated on the inter pupillary scale (Fig. 1, 4). Remember this setting for faster resetting later.

Rubber eyecups

When wearing glasses, fold down eyecups to adjust the distance between the glasses and the eyepiece to achieve the best observation effect.

Focusing

In order to get a clear image, you must focus the binoculars. This model has two individual diopter adjustment rings on each telescope so you can adjust the optics to your individual eyes. You will need to adjust each eyepiece.

When holding the binoculars in front of your your eyes and viewing at an object, close the left eye. Turn the right diopter adjustment ring until the object image appears sharp and clear.

Then open your left eye and close your right eye. Turn the left diopter adjustment ring until the object image appears sharp and clear in your left eye.

If you share your binoculars with another person, note the diopter index mark setting at the base of the eyepieces first **(Fig. 1, 3).

**

Then you can simply return the eyepieces to those settings when you next use the binoculars to view an object at the same distance.

How to use the Mils Reticle to estimate distance

What is the View Angel

The view angle of an object is the angle from your binoculars to the edges of the object. It is calculated in mils using the Mils Reticle on your binoculars. Using this measurement you can calculate the distance to an object where the height or width of that object is known. This measurement is taken either horizontally or vertically and known as Horizontal View Angle or Vertical View Angle.

How to calculate View Angle when The object is larger than the scale

When the object is larger than the scale , choose a midpoint, take the view angle of this point and multiply by 2.

How to calculate the Horizontal View angle of an object
Where the object fits within the horizontal scale range(0~80 mils)inside the binocular, line one edge of the object up with a point on the horizontal scale line and read the value from where the other edge meets the horizontal scale. In Fig. 4 the right edge of the sail boat is at zero and the left edge at 20 so the horizontal view angle is 20 mils.(10 on the scale = 10 mils, 20 = 20 mils etc).

How to calculate the Vertical View Angle of an object
Use the same method as above but use the vertical scale. In Fig. 5 the base of the light house meets the vertical scale at zero and the top of the lighthouse meets the scale at 40 so the vertical view angle is 40 mils.

How to use your binoculars to estimate distance
The formula for measuring distance is L(km)=H(m)/w(mils) Where:
L=the distance between the observer and the object in km
H=the height of the object in m(this must be a known value)
W=the view angle of the object measured using the mils reticle on your binoculars
When measuring the distance, first estimate the height of the object, then take
the view angle reading on your binoculars and enter both the formula.

For example:
A light house is 12m. (H=12m)
The view angle on the binoculars is 40 mils (see fig.5)
Using the formula L (km) =H (m)/w (mils)
we can estimate the distance.
L=12/40=0.3km (300m)
Therefore, the distance between the observer and the lighthouse is 300m.

How to use the compass

The azimuth angle can be measured through the compass built into the right half of the body. It shows the azimuth of the object relative to the observer.

Each graduation of the compass equals one degree. When the object lies to the north, the compass shows 360° (degrees). And it will increase when you turn clockwise. 90°means the object is located to the east, 180°means south and 270°means west.

In order to ensure precise angle measurements, the binoculars should be kept horizontal and level when reading the compass. The object should be in the middle of the reticle.

Under the condition of night or darkness, he reticle needs to be illuminated by pressing the on/off button.

Changing the batteries

The batteries will be exhausted if the internal lighting system has been used for long periods. Batteries can also become weak if not used for an extended period of time. If the light becomes dim, open the battery cover and replace with fresh batteries.

Batteries are included and uninstalled in your binoculars, which is put in the bag, you need to install it first before you use. When it becomes necessary to replace them, unscrew the battery cover with a coin or screwdriver and replace with the same type. Be sure to install the batteries in the same direction as the originals, with the flat positive (+) side facing up towards the cover on the battery. Screw the battery cover back on tightly and press the illuminator button to test the light.

**Figure 6

**

Note!
The battery (type AG9/LR936) should be replaced at the same time. The battery should be taken out if the binoculars will not be used for a long time. Batteries left in the binoculars for extended periods of time without being used may leak and cause damage to the binoculars.

Storage and maintenance

Binoculars are a precision optical instrument. They should be carefully handled and maintained in order to keep them in good working order.

General maintenance

Lenses: Always clean the lenses after each use and before you replace the binoculars in the carry case. After each use, brush any dust or dirt from the lenses. After brushing, gently wipe each of the lenses with the special optical cloth. Never use your fingers to wipe the lenses as body oil will get on the lenses and possibly damage them. Never use anything to wipe your lenses except special optical cloths. Always keep your optical cloth in the binocular case for easy access for cleaning.

Although the eyepieces are made to turn for individual eye diopter adjustments, do not turn them beyond the factory set stop. Forcing it beyond this point will damage the eyepiece optics and make the binoculars unworkable.

After use, make sure to turn the diopter adjustment to “0” position to avoid damaging the ocular system.

Avoid any extreme shaking or dropping the binoculars. This may damage the internal optics and prisms. Store the binoculars in a dry and well-ventilated place.

Viewing the sun can cause permanent eye damage. Do not view the sun with this product or even with the naked eye.

Never leave your binoculars in a place exposed to direct sunlight. This could result in a potential fire hazard.

Cleaning

Clean the eyepieces and lenses only with a soft, lint-free cloth like a micro fiber cloth.
To avoid scratching the lenses, use only gentle pressure with the cleaning cloth. To remove more stubborn dirt, moisten the cleaning cloth with an eyeglass-cleaning solution and wipe the lenses gently.

Disposal

Dispose of the packaging material/s as legally required. Consult the local authority on the matter if necessary.

Do not dispose of electrical equipment in your ordinary refuse. The European guideline 2002/96/EU on Electronic and Electrical Equipment Waste and relevant laws applying to it require such used equipment to be separately collected and recycled in an environment-friendly manner.

Empty batteries and accumulators must be disposed of separately. Information on disposing of all such equipment made after 01 June 2006 can be obtained from your local authority.

In accordance with the regulations concerning batteries and rechargeable batteries, disposing of them in the normal household waste is explicitly forbidden. Please pay attention to dispose of your used batteries as required by law – at a local collection point or in the retail market (a disposal in domestic waste violates the Battery Directive).

Batteries that contain toxins are marked with a sign and a chemical symbol. „Cd“ = cadmium, „Hg“ = mercury, „Pb“ = lead.
Dustbin Icons
1 battery contains cadmium
2 battery contains mercury
3 battery contains lead

EC Declaration of Conformity

Bresser GmbH has issued a „Declaration of Conformity“ in accordance with applicable guidelines and corresponding standards. The full text of the EU declaration of conformity is available at the following internet address:

www.bresser.de/download/1866840/CE/ 1866840_CE.pdf.

Contact Us:

Please contact the service center first for any questions regarding the product or claims, preferably by e-mail.

E-Mail: service@bresseruk.com
Telephone: +44 1342 837 098

BRESSER UK Ltd.
Suite 3G, Eden House
Enterprise Way Eden bridge, Kent TN8 6HF
United Kingdom

Number charged at local rates in the UK (the amount you will be charged per phone call will depend on the tariff of your phone provider); calls from abroad will involve higher costs.

Bresser GmbH
Guten bergstraße 2
46414 Rhede · Germany
www.bresser.de

@ Bresser Europe

2021 · Bresser GmbH.
Errors and technical changes reserved.
Manual_1866840_Nautic-7×50-Gen-II_en-de_BRESSER_v122021b