Braun Monocular 8×42 Instruction Manual

  • Anika 

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Dear customer,
Thank you very much for purchasing the BRAUN Monocular 8×42. You have acquired a product of high quality. Please read these instructions carefully and keep them for reference so that you can look up in case of possible questions. We hope you will enjoy this BRAUN product.

Components

1. Eyepiece with foldable eyecup for people who wear eyeglasses
2. Rotating ring for focusing
3. Protective rubber lid for the lens
4. Lens
5. Lugs for mounting the carrying strap
6. Light aperture for the compass

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

Note for people who wear eyeglasses

The BRAUN monocular features a foldable eyecup (1) for people who wear eyeglasses, which will give you a better overview of the field of view. If you do not wear eyeglasses, leave the eyecup in the state the monocular was delivered. In this position, the monocular will have the correct distance to your eye, ensuring a shake-free and steady support. Moreover, it will minimise scattered light from the side.

Focusing

In order to view an object focused and at the optimal zoom, you have to adjust the focusing ring (2) to each individual object. Perform these steps:
(a) View through the monocular with one eye and shut the other.
(b) Sight the object.
(c) Turn the focusing ring on the monocular to the left or right without taking the monocular down, until the object is well focused.
Your BRAUN monocular is now perfectly focused on the object. If you or the object move during the observation, you might have to re-adjust the focus. You have to set the focus with each new object.

Note:
Make sure you do not hide the light aperture (6) for the compass with your fingers.

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

Using the MIL reticle for telemetry

Measuring the distance with a simple formula when the height or length is known:

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

In general, the rough dimensions (height/ length) of the measured objects will be known, as the observed objects will mainly be persons, buildings or vehicles.
1) Elevation angle = vertical angle
2) Azimuth = horizontal angle

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

Measuring the elevation angle (height angle) with vertical scale of MIL reticle

The elevation angle measures the angle between an imagined horizontal zero line, starting from the position of the observer to the observed object, and the height of an individually defined point of the sighted
object of observation (in the figure, for example, the base of the lighthouse on the imagined horizontal zero line and the tip of the lighthouse as individually determined point).

If the elevation angle is within the area of the vertical scale value of 70 MIL (see figure), align the vertical scale in the reticle so that “0” is on the lighthouse base. In the example hown, the elevation angle of the lighthouse can be read easily and directly. It amounts to 62 MIL, where 1 MIL corresponds to 1/1000 inch.

If the elevation angle of the object is outside the vertical scale value of 70 MIL, determine the elevation angle by repeating the measuring steps.

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

Measuring the azimuth (horizontal angle) with horizontal scale of MIL reticle

The azimuth is the horizontal deviation from North. In the example shown, the azimuth of the object can be determined easily and directly with 68 MIL (40+28) using the horizontal scale value (see measuring of elevation angle).

Determining the height or length of an object when the distance is known

Based on the measurement of the elevation angle or azimuth, the height or length of an object can be determined using the following simple formula:

Height of object (m) = distance (km) x elevation angle
or
Length of object (m) = distance (km) x azimuth

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

Note:
A scale gradation correspond to 1 degree.

Using the compass

On a compass, the direction is read in degree. The north has an azimuth of 360°, the east of 90°, the south of 180° and the west of 270°.

Braun Monocular 8x42 Instruction Manual

Braun Monocular 8×42 Instruction Manual

CARE TIPS

Dirt and soil on the lens may deteriorate the brightness of your BRAUN monocular. Please avoid finger prints, dust or soil on the lens and eyepiece surfaces. You can wipe off soil with a soft hair pencil or an optical cloth. Do not use harsh detergents.

TECHNICAL DATA

Magnification : 8x
Lens diameter : 32 mm
Prism : BAK – 4
Field of view : 7º (112m / 1000m)
Waterproof : Yes
Nitrogen filled : Yes
Lens system : ULTRALIT
Exit pupil : 5.25 mm
Eye relief : 18 mm
Close focus distance : 13m
Diopter adjustment : -4/+4
Waterproof (max. depth/time) : Yes (0.5m / 20 min.)
Thread for tripod : No
Dimensions : Approx. 61 x 65 x 143 mm
Weight : Approx. 340 g
Item no. 20140

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