Telescopes > ASA > Astrograph > ASA Telescope 20N 500/1900 Astrograph OTA 3"-Wynne

Product no.: 46452

Telescope 20N 500/1900 Astrograph OTA 3"-Wynne

$ 35,700.00 incl. VAT plus shipping costs

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Product description Specifications Recommended accessories Customer reviews (0) Product safety

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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Focal length (mm)

Focal length

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

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1900

Aperture (mm)

Aperture

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

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500

Aperture ratio (f/)

Aperture ratio

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

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3,61

Tube weight (kg)

Tube weight

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

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Tube length (mm)

Tube length

Including eyepiece, but excluding dew cap.

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1631

Tube material

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

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Carbon

Carbon is especially light and stable, but is also more expensive than metal

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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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Reflector

tube diameter (mm)

590

Reflector

Special characteristics which only reflectors possess, can be found under this heading.

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Secondary mirror diameter (mm)

150

Secondary mirror obstruction

The shadow effect of the telescope optics due to the secondary mirror, because this lies in the optical path.

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Ventilation for central mirror

Ventilation for primary mirror

Fan for a quicker alignment of the mirror temperature to the ambient temperature.

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yes

Main mirror´s construction

Main mirror construction

Here, the construction type means the geometric shape of the primary mirror.

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parabolic

Primary mirror - Material

Suprax

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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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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Motorized

yes

Included accessories

Many telescopes came with simple accessories.

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Tube clamps

yes

Eyepiece adaptor

2" - 3"

Transport cases

yes

Collimation aid

Laser

Corrector

Optical aid to correct aberrations.

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3" Wynne corrector

General

Series

Astrograph

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

Nature Observation

Moon & Planets

yes

Nebulae & galaxies

yes

Sun

Telescopes for safe solar observing.

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not recommended (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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Advanced

Telescopes for experienced observers, but also for ambitious beginners.

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Product safety

Manufacturer: ASA Astrosysteme GmbH, Galgenau 19, 4212 Neumarkt i. M. , AT, www.astrosysteme.at

Product safety

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Transport cases

Drawtube

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