The eye relief specifies the maximum distance from the eyepiece at which the entire field of view can still be seen. A suitable distance for spectacles wearers is >16mm.

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54-76

Interpupillar distance (mm)

Interpupillary distance

The interpupillary distance indicates how far the eyepieces or tubes can be pushed together or pulled apart. This is an important indication, since each person has a different interpupillary distance.

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Lens coating

Coatings on optical surfaces have the job of minimising annoying reflections. In this way light transmission and contrast is increased.

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fully, multiple

Diopter-adjustment side

on both sides

Eyepiece cups

The eyecups are located on the eyepieces and protect they eyes from stray light.

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folding

Handle

yes

Front lens diameter (mm)

Front lens diameter

The second specification in the binoculars’ model number is the front lens diameter. The larger it is, the more light the binoculars collect.

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100

Focal length (mm)

550

Type of build

Describes the internal structure of a pair of binoculars, thereby further subdividing the different types.

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Porro prisms

A classic binoculars design, in which the objective lenses are slightly further apart than the eyepieces.

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Magnification

The first number in the binoculars’ model number represents the magnification. It specifies how much larger an object appears compared to when viewed with the naked eye.

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Exit pupil (mm)

Exit pupil

Relates to the beam of light emitted by the eyepiece. The exit pupil is closely associated with the brightness of a pair of binoculars.

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3,3

Special features

Binoculars can be equipped with additional functions such as an image stabilizer or a zoom.

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Splash-proof

These binoculars may only be exposed to moderate moisture or light drops of water.

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yes

Eyepieces for spectacle wearers

These eyepieces have a relatively large eye relief. It is possible to wear spectacles while observing and still benefit from a comfortable viewing position.

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yes

Threaded tripod connector

A 1/4" thread for connection to a photographic tripod. Most binoculars require an additional tripod adapter.

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Tripod connector on underside

inert gas charge

yes

Lens cover

yes

Lenses with special glass for high colour purity

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yes

Field of view

Information about the field of view enables binoculars to be more easily compared with one another.

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True field of view (°)

True field of view

The angular field of view visible with the binoculars.

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2,1

Field of view at 1,000 m (m)

Field of view at 1,000 m

The visible field in meters, that can be seen from a distance of 1,000 meters. This information is often more easily visualised as an angular measurement.

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Apparent field of view (°)

Close focus limit (m)

Close focus limit

The shortest distance which can still be seen sharply through binoculars.

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Light intensity

The geometric light intensity is a theoretical value. It is an indication of the expected brightness of the image.

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Twilight factor

Used to compare binoculars’ performance in low light conditions. The higher the number, the more suitable it is for twilight. However, the value should always be considered in connection with the exit pupil.

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General

Series

Brightsky ED-APO

Overall size LxWxH (mm)

520x270x155

Weight (g)

7000

Area of application

The areas of application help you to choose the right binoculars for your purpose.

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Astronomy

You are fascinated by the stars, but don't want to set up telescope right now? You can immerse yourself in the world of astronomy using many binoculars.

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very good

Hunting

Do you want to stay in the hide until dusk, or do you prefer to stalk game? We have the right binoculars for you!

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not recommended

Kids binoculars

not recommended

Travel and sports

not recommended

Sailing

Even the sailors of old used binoculars to orient themselves on the high seas. In some cases, modern binoculars even offer a built-in compass and a reticle for estimating distances.

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not recommended

Theatre

Whether it's serious opera, a romantic operetta, folk theatre or a musical; with opera glasses or small binoculars, you'll be part of the action.

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not recommended

Bird watching

Blackbird, thrush, finch or starling?
Binoculars helps to spot and identify the bird.

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not recommended

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