Telescopes > Pro RC > Knaeble Ritchey-Chretien RC 250 FC/Ti

Product no.: 33669

Ritchey-Chretien RC 250 FC/Ti

Name: Knaeble Ritchey-Chretien RC 250 FC/Ti
Brand: Knaeble
Price: 13010.82 USD

$ 13,010.82 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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Ritchey-Chretien

Aperture (mm)

Aperture

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

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250

Focal length (mm)

Focal length

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

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2000

Aperture ratio (f/)

Aperture ratio

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

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Resolving capacity

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

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0,46

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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13,8

Light gathering capacity

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

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1280

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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500

Tube construction

Truss Tube

Truss tube

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

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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 length (mm)

Tube length

Including eyepiece, but excluding dew cap.

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737

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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3 (with SC thread)

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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OTA

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

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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

General

Total weight (kg)

Series

Pro RC

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Product safety

Manufacturer: Knaeble Optical Systems UG, Rönnestraße 13, 14057 Berlin, DE, http://www.knaeble-eng.com/

Product safety

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