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Orion 5659 - 2" SkyGlow Ingrandisci

Orion 5659 - 2" SkyGlow

Orion USA

Orion 5659 - 2" SkyGlow Broadband Nebular Filter for visual use

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OR5659

Disponibilità: disponibile in 24/48 ore

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106,00 € 106 EUR 2020-09-13

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Codice articolo: OR5659

This filter blocks the most common wavelengths of light pollution while passing desirable wavelengths with very little attenuation, yielding better deep-sky views
♦ enhances deep-sky observing in moderately light-polluted skies

♦ eyepiece filter blocks the most common wavelengths of light pollution

♦ improves the views of nebulas, galaxies and star clusters when viewing in areas with light pollution

♦ Ideal for backyard astronomy oberving when you don´t have time to trek to a dark sky site

♦ designed for use with 2" telescope eyepieces

♦ Metal filter cell construction

  Orion 5659 - 2" SkyGlow Broadband Nebular Filter for visual use [EN]

The SkyGlow Broadband filter enhances contrast of deep-sky objects

This 2" SkyGlow Broadband telescope filter is an advanced multilayer "interference" filter that blocks the most common wavelengths of light pollution while passing desirable wavelengths with very little attenuation, yielding better deep-sky views.

It features improved blocking of mercury-vapor light and higher transmission at critical hydrogen-alpha and hydrogen-beta lines than competing filters. Bright, light-polluted skies appear much darker, and the contrast between object and sky is improved significantly.

  Orion 5659 - 2" SkyGlow Broadband Nebular Filter for visual use [EN]

Enhances All Objects

This contrast-enhancement effect is particularly apparent on nebulas. Unlike stars, emission nebulas give off light in a very narrow range of wavelengths. Orion SkyGlow telescope filters allow maximum transmission of the important wavelengths of hydrogen-alpha, hydrogen-beta, and doubly ionized oxygen-the ones most commonly emitted by nebulas.

Views of galaxies and star clusters are also enhanced, although not as much.

technical data

Transmission of wanted spectral lines: >95%
Transmission of unwanted light: <3%
Cell: aluminium with 2" filter thread

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