Telescopes > BORG > BORG Apochromatic refractor AP 55/200 PLUS OTA

$BORG Apochromatic refractor AP 55/200 PLUS OTA$ $BORG Apochromatic refractor AP 55/200 PLUS OTA$

BORG

Product no.: 63169

Apochromatic refractor AP 55/200 PLUS OTA

Name: BORG Apochromatic refractor AP 55/200 PLUS OTA
Brand: BORG
Price: 2080 USD

$ 2,080.00 incl. VAT, plus shipping costs

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Product description Specifications Recommended accessories Customer reviews (0)

Product description

It not only matters which telescope you buy but also where you buy it. Our additional services:

We are a leading telescope dealer and know the devices we sell. Our customer service team will gladly help you after your purchase if you have problems with assembly or operation.
We provide a copy of the 80-page Telescope ABC beginners handbook with every telescope.
We also provide an edition of the exciting astronomy magazine, “Sterne und Weltraum” with each telescope.

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

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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200

Aperture ratio (f/)

Aperture ratio

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

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3,6

Resolving capacity

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

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2,51

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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10,5

Light gathering capacity

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

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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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110

Tube material

Most telescopes are made of steel, aluminium or carbon fibre.

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Aluminium

Tube weight (kg)

Tube weight

The weight of the tube is critical for the correct choice of mount.

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1,2

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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Starlight FeatherTouch

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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Gear reduction

1:10 Fine movement

Rotating

yes

Backfocus (mm)

Backfocus

The position of the focus, measured from the plug connection, with the eyepiece fully retracted.

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Connecting threaded socket (camera-side)

M57

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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no mount

Type of build

Describes the exact construction of the particular mount and thereby further subdivides the different types of mount.

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OTA

An OTA is an optical tube without a mount. It is short for optical tube assembly.

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Included accessories

Many telescopes came with simple accessories.

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Corrector

Optical aid to correct aberrations.

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integrated

Dew Shield

yes

Tube clamps

yes

Carry case

yes

Prism rail

without

finder base

without

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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Astrophotography

yes (very good)

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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Advanced

Telescopes for experienced observers, but also for ambitious beginners.

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yes

Observatories

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

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$BORG Apochromatic refractor AP 55/200 PLUS OTA$

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