Telescopes > Orbinar > Orbinar 400/70 Reise Teleskop + Rucksack Spektiv Refraktor Fernrohr Astronomie

Orbinar

Product no.: 59857

400/70 Reise Teleskop + Rucksack Spektiv Refraktor Fernrohr Astronomie

Name: Orbinar 400/70 Reise Teleskop + Rucksack Spektiv Refraktor Fernrohr Astronomie
Brand: Orbinar
Price: 85.33 USD

~~$ 105.72~~ Now only:

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Product description Specifications Recommended accessories Customer reviews (0)

Product description

Specifications

Optics

A telescope tube is referred to as an optic because it contains the components necessary to collect and concentrate light.

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Type

There are basically two different types of telescope. A distinction is made between refractor (lens) and reflector (mirror) telescopes.

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Refractor

Type of build

Describes the exact structure of the telescope thereby further subdividing the different types of telescope.

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Achromat

An achromatic is a refracting telescope (refractor), which consists of two lenses. It is the classic refractor design.

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Aperture (mm)

Aperture

The aperture indicates the diameter of the objective lens or the mirror.

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Focal length (mm)

Focal length

This is the distance between the objective lens or mirror and the focal point.

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400

Aperture ratio (f/)

Aperture ratio

Is the ratio of the aperture to the focal length of a telescope.

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5,7

Resolving capacity

The ability of the optic to discern the fine detail of objects that are close together.

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1,64

Limit value (mag)

Limit value

Describes the brightness of a star or point-shaped object, which can still just be distinguished by the telescope. The naked eye, for example, can make out stars with a magnitude of up to 6.

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Light gathering capacity

Light-gathering capacity of the telescope compared to the eye.

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100

Max. useful magnification

The telescope’s magnification should not exceed this factor, because otherwise the image will appear weak and dark.

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140

Tube construction

Full tube

Focuser

A focuser is used to hold an eyepiece. The image can be focussed using the focus wheels on the side.

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Type of build

There are basically two different construction types: the rack and pinion focuser and the Crayford focuser.

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Gear rack

Connection ( to eyepiece)

Focusers are available in 1.25" or 2" formats. Many 2" focusers also have a 1.25" adapter.

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1,25"

Mount

A mount is the foundation of an astronomical telescope. It usually consists of the mount head and an appropriate tripod.

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Mounting type

Are mainly differentiated between equatorial and altazimuth. A special type of altazimuth mount is the Dobsonian mount.

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Azimuthal

These astronomical mounts are particularly lightweight and compact.

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Tripod

The tripod is a part of the mount, it provides a stable stand and is usually adjustable in height.

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Material

Aluminium

Included accessories

Many telescopes came with simple accessories.

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1.25'' eyepieces

Eyepieces are needed for observing. Depending on the focal length, you achieve a certain level of magnification.
The specification 1.25" refers to the diameter of the connector (1.25" = 31.8 millimetres).

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4, 10, 20

Finder scope

A mini telescope used to locate a celestial object. There are optical finders and red dot finders.

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5x24

Carry case

yes

General

Total weight (kg)

Special recommendation

yes

Area of application

The area of application will give you a broad overview of the purposes for which the telescope is suited.

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Moon & Planets

yes

Nebulae & galaxies

not recommended

Nature Observation

yes

Astrophotography

not recommended

Sun

Telescopes for safe solar observing.

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yes (Only with appropriate Sun filter)

Recommended for

Recommended for...

The classification of the telescopes according to their suitability for beginners, advanced or observatories is useful as an initial orientation.

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Beginners

Telescopes that are supplied as a complete system and are easy to operate.

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yes

Advanced

Telescopes for experienced observers, but also for ambitious beginners.

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Observatories

Telescopes suitable for a fixed mount, whether that is in the garden or an observatory.

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*All prices include VAT plus shipping costs.

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