BRESSER 1866840 Marine Binoculars Instruction Manual

: June 14, 2024
: BRESSER

Table of Contents

BRESSER 1866840 Marine Binoculars
GENERAL WARNINGS!
Intended use
Parts overview
Changing the batteries
General maintenance
Cleaning
Disposal
UKCA Declaration of Conformity
References
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BRESSER 1866840 Marine Binoculars

Visit our website via the following QR Code or web link to find further information on this product or the available translations of these instructions.

www.bresser.de/P1866840

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

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

Graticule and scale

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.

Interpupillary 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 interpupillary distance to fit your eyes. The setting for your eyes will be indicated on the interpupillary 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 isknown 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 sailboat 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 lighthouse 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(k-m)=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 lighthouse 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, the 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 it 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 it 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.

Note!
The battery (type LR396) 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 a 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 the “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 microfibre 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-clean-ing 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 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 (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.

battery contains cadmium
battery contains mercury
battery contains lead

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

UKCA Declaration of Conformity

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

internet address:
www.bresser.de/download/1866840/UKCA/1866840_UKCA.pdf Bresser UK Ltd.Suite 3G · Eden House · Enterprise Way Edenbridge, Kent TN8 6HF Great Britain