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Vendo: BST Starguider ED 8mm

Post su Astronomy in: Oculari il 17 Aprile 2020




CHIUSO Vendo oculare COME NUOVO, inutilizzato, provato sul campo per due brevi osservazioni nel giardino di casa, e per qualche visione di prova in diurno (con un mak 90 vedevo distintamente gli scialpinisti su una cima a 22 km dalla mia finestra, 156 ingrandimenti) con 60 gradi di campo apparente e le seguenti caratteristiche:

- 2 elementi in vetro ED spaziati
- 60 gradi di campo
- 13mm eye relief
- ogni supecifie "air to glass" è fully multicoated - ad alto contrasto
- largo diametro della pupilla di uscita: 21mm
- sharp edge to edge performance
- blackened lens edges to minimise internal reflections
- capture ring nosepiece
- filettatura standard 1.25"
- wind up eyecups for comfortable viewing
- rubber clad body
- 181 grammi

Di seguito una descrizione del produttore:
The eyepiece uses two separate ED (Extra-low Dispersion) glass elements of different glass types in its optical system to provide exceptional colour fidelity with astonishingly low levels of chromatic aberration) so that the true colour differences between binary star pairs and planetary surface details are easily visible. It has 60° field of view which is very flat. It is particularly recommended with telescopes with a f/5, or greater, focal ratio. It is uniformly sharp edge-to-edge, with markedly low astigmatism. Barrel distortion is essentially non-existent, eliminating annoying "goldfish bowl" effect of distortion of the image which is often seen in some eyepieces when panning across a starfield.

Each air-to-glass surface in the Starguider ED eyepiece is fully multicoated (*see glossary of coatings) for high light transmission and exceptional contrast. This high contrast makes it a good choice for splitting close binary stars, for examining low contrast lunar and planetary detail, and for finding small and faint planetary nebulae against a truly dark sky background. The lens edges are blackened to eliminate internal reflections and further impove contrast. As you would expect, the chrome barrel is threaded for standard 1.25" filters and has a capture ring to help reduce the chances of accidentally dropping the eyepiece out of the focuser.

Starguider ED eyepieces are parfocal, minimizing the amount of refocusing needed when changing eyepieces within the series. The eyepiece is set in heavy rubber cladding with is grooved for easy grip. It has a soft rubber twist up eyecup which will make it unbelievably convenient to those who wear spectacles.

The colour coded body rings and clear lettering print will help you find the right one in the dark.

The eye lens is 21mm in diameter so no squinting through a hole the size of a pinhead.

It is the same eyepiece that has been sold under the Paradigm, Olivon and Orion brands and often for considerably more.

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spedizione con corriere espresso 6 euro

17 Aprile 2020
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Trattativa in Privato
Prezzo:
54,00 €
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Stato del bene:
Usato per dimostrazione

Modalità di pagamento:
Bonifico bancario

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