Astronomy > Telescopes > PlaneWave > PlaneWave Dall–Kirkham telescope DK 432/2939 CDK17 Astrograph L-500

Product no.: 85765

Dall–Kirkham telescope DK 432/2939 CDK17 Astrograph L-500

Name: PlaneWave Dall–Kirkham telescope DK 432/2939 CDK17 Astrograph L-500
Brand: PlaneWave
Price: 63600 USD

$ 63,600.00 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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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

Type of build

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

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Dall–Kirkham telescope

Aperture (mm)

Aperture

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

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432

Focal length (mm)

Focal length

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

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2939

Aperture ratio (f/)

Aperture ratio

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

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6,8

Resolving capacity

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

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0,39

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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3810

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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864

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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1067

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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Tube construction

Truss Tube

Truss tube

In contrast to the solid tube, here the optical tube is constructed of rods.

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Reflector

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

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Primary mirror - Diameter (mm)

432

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

Secondary Mirror Heating

Secondary mirror heating

This heater prevents condensation on a reflecting telescope’s secondary mirror.

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yes

Primary mirror - Material

Pyrex glass

Secondary mirror material

Pyrex glass

Main mirror´s construction

Main mirror construction

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

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elliptical

secondary mirror design

spherical

reflectivity

aluminising

Aluminium

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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without

Backfocus (mm)

Backfocus

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

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260

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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Type of build

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

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L-500

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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Load capacity (kg)

Weight (kg)

100

GoTo control

Object positioning system, available in real GoTo and also PushTo versions.

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yes

Cable-guide

internal

Drive type

Other

Tripod

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

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Type

without

Included accessories

Many telescopes came with simple accessories.

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Corrector

Optical aid to correct aberrations.

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integrated

Prism rail

Losmandy-Style

Carrying handle

yes

Tube clamps

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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Astrophotography

yes (very good)

Moon & Planets

yes

Nature Observation

Nebulae & galaxies

yes

Sun

Telescopes for safe solar observing.

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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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Observatories

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

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yes

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Product safety

Manufacturer: Baader Planetarium GmbH, Zur Sternwarte, 82291 Mammendorf, DE, www.baader-planetarium.de

Product safety

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