Manufacturer: -TS Zubehör
Product number: TSCHR

EUR 34,90


incl. 19 % VAT (DE)  
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rating: 4.7 of 5
  • Details..
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  • In the box..
Collimating eyepiece for Newtonias and refractors - Cheshire eyepiece 1,25"
Allows perfect collimation of Newtonian telescopes and refractors.

The Cheshire eyepiece is the classic collimating tool for Newtons and refractors. Light is directed into the optical path through a mirror-polished aluminum insert. The collimation can be checked through a peeping hole. At the telescope end of the Cheshire eyepiece there is an additional crosshair.

The Cheshire eyepiece has a very wide stop edge. This means that even with somewhat larger 1.25" focusers, an exact stop is always defined.

Newtonian telescopes: In a correctly adjusted telescope, you will see the centre mark of the primary mirror and the reflected image of the secondary mirror concentric and centred on each other. Misalignment manifests itself in a shift of these elements towards and/or away from the centre.

Refractors: With a refractor, you get an image that ideally shows several concentrically arranged rings. The number of these rings depends on the type of objective. If the rings are not concentric, but shifted against each other, the telescope must be adjusted.

Practice tip from TS
When adjusting refractors, the eyepiece should always be straight-sighted, i.e. never used with a star diagonal, because the mirror itself can also introduce inaccuracies into the system. When adjusting Newtonian telescopes, the eyepiece should not be clamped, but inserted unclamped into the focuser with the tube horizontal and the focuser pointing vertically upwards.

Collimation instructions as PDF file
Teleskop-Service has created collimation instructions:
Collimation guide for Newtonian telescopes.
Collimation guide for refractors.

suitable for:Newtonian telescopes and refractors
Telescope connection:1,25"
adjustment eyepiece



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Reviews

Written by Horst-Dieter Döricht
on 2023-05-03

"Problemlose und einfache Kontrolle der Zentrierung des Strahlengangs"

Written by Palle Bohnholdt
on 2022-09-27

"Veludført og fungere fint."

Written by Tom Regnery
on 2020-10-15

"Das Gerät ist anwendbar, jedoch ist das Einguckloch zu groß. Das Fadenkreuz verschwimmt zur Unkenntlichkeit. Nachdem ich die Schutzkappe mittig angepiekst und aufgesetzt habe, konnte ich mit dem Produkt arbeiten, da nun das Loch klein genug war, um das Fadenkreuz scharf zu sehen."

Written by Sasho Panov
on 2020-03-27

"The product was delivered as it is described on TS page"

Written by Rudolf Riedl
on 2020-01-29

"War eine gute Hilfe bei der Überprüfung der Kollimation."

Written by Ton Timmermans
on 2019-11-30

"Seher gut"

Written by Dirk Fahrendholz
on 2017-05-05

"Gutes Justierokular, für Refraktoren, wenn auch zur Erkennung der einzelnen Kreise etwas Übung erforderlich ist. Entgegen der Beschreibung ist sehr wohl ein Fadenkreuz vorhanden."

Written by Juraj Varga
on 2017-03-09

"Nice and good, like on the picture."

Written by Jürgen Böttcher
on 2017-02-04

"Kontrolle meines 4 Zoll Refraktors. Hat funktioniert, die Ringe sind zwar nicht super konzentrisch aber noch in der Tolleranz. Da schraub ich lieber nicht! Die Linsenringe sind jedoch recht klein und schwer zu erkennen. Trotzdem, jetzt weis ich mehr über meinen Liebling."

Written by Siegmar Boberg
on 2017-01-27

"Ist in Ordnung. Artikel erfüllt vollauf seinen Zweck."

Written by PAOLO CONTI
on 2016-03-22

"BUON PRODOTTO UTILE E PRATICO PER INIZIARE UNA CORRETTA COLLIMAZIONE DEL TELESCOPIO MAK 127/1500"