EXPLORE SCIENTIFIC 2" S-II Nebula Filter 6.5nm

The EXPLORE SCIENTIFIC S-II filter allows the accurate observation of planetary nebulae, emission nebulae and supernova remnants; narrow band version with 6.5 nm to increase contrast even in difficult urban conditions.

High-quality EXPLORE SCIENTIFIC S-II filter
Only lets the emission line of ionized sulfur at 672 nm pass
Absorbs all other emission lines and almost all artificial light
For planetary nebulae, emission nebulae and supernovae
Band pass width: 6.5 nm
Narrow band version for difficult urban conditions
Individual test certificate included to guarantee you receive a premium filter

€115.00*

% €229.00* (49.78% saved)

Prices include VAT. Shipping costs not included

Available, delivery time: 1-3 days

Product number: 0310120

EAN: 4007922072708

WEEE-Reg.-Nr.: DE 34323861

Weight: 0.015 kg

With BRESSER, you can enjoy a smooth introduction to the vast world of astronomy. Our detailed information ("Telescope Guide") provides valuable tips for beginners— but even experienced astronomers can use the information we provide (e.g., tables for the geographical latitude of all major world cities) as a reference.

Here is the table of contents of the comprehensive BRESSER Telescope Guide:

Introduction to Astronomy

With BRESSER, you can enjoy a smooth introduction to the vast world of astronomy. Our detailed information ("Telescope Guide") provides valuable tips for beginners—but even experienced astronomers can use the information we provide (e.g., tables for the geographical latitude of all major world cities) as a reference.

Here is the table of contents of the comprehensive BRESSER Telescope Guide:

Introduction to Astronomy

The View of the Starry Sky

Foundations of Celestial Mechanics

Telescopes - Optics and Mechanics

Product information "EXPLORE SCIENTIFIC 2" S-II Nebula Filter 6.5nm"

One of the most important obstacles for the exploration of the night sky is the brightening of the night sky by artificial lighting, such as streetlights. The night sky is not really dark in the vicinity of towns or cities, which reduces the visibility of objects beyond the solar system enormously. Depending on the type of celestial object, it is possible to increase the contrast dramatically by blocking the interfering artificial light.

The EXPLORE SCIENTIFIC S-II filter uses the property of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines. The emission lines are associated with certain chemical elements - in this case ionized sulfur. The EXPLORE SCIENTIFIC S-II nebula filter blocks all other colors (and thus almost all artificial light) and lets only the emission lines of ionized sulfur at 672 nm through. The effect is amazing: suddenly, nebulae become visible in places that appear completely empty without the filter. In slightly brightened skies, many planetary nebulae, emission nebulae and supernova remnants can be seen without any difficulties when using this filter. A must for every visual observer and for astrophotography.

EXPLORE SCIENTIFIC nebula filters come with an individual test report - so you can be sure to get high quality filters.

FEATURES

Simplifies the observation of planetary nebulae, emission nebulae and supernova remnants
Blocks almost all artificial light
Only lets the emission lines of ionized sulfur at 672 nm pass
Transmission bandwidth: 6.5 nm
Allows for more contrast in faint deep sky objects
ideal for use near cities, in heavy brightened skies
individual test certificate included to guarantee you receive a premium filter

SCOPE OF DELIVERY

1x 2'' S-II nebula filter

Colour:	black
Field of application [Telescope-filter]:	Filter for Deep-Sky Observing and Astrophotography
Material:	Glass, Plastic
Telescope filter type:	Nebula filter

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EXPLORE SCIENTIFIC 2" H-Alpha Nebula Filter 7nm

Apart from air turbulence, the brightening of the night sky is the greatest barrier to observing faint objects beyond the solar system. Due to streetlamps and other artificial lighting the sky in urban areas is no longer properly black. As a result, the contrast and thus the perception of deep-sky objects also suffer. However, depending on the type of celestial object, it is possible to filter out some of the interfering light, making it easier to photograph the objects.The EXPLORE SCIENTIFIC H-Alpha filter uses the characteristic of the so-called emission nebulae. These objects glow in certain colors, the so-called emission lines. The emission lines are associated with certain chemical elements - in this case the red glowing hydrogen. This filter blocks all other colors (and therefore almost all artificial light) and lets only the emission lines of hydrogen through. Especially the interfering light of mercury and sodium vapor lamps is effectively blocked. The effect is amazing: Suddenly, nebulae become visible on photos in locations which appear completely empty without the filter.The EXPLORE SCIENTIFIC H-Alpha Nebula Filter has been developed exclusively for astrophotography. Especially in heavy light-polluted skies many emission nebulae only become visible and are shown in full expanse on astrophotos when using this filter. The H-Alpha nebula filters make astrophotography near the city possible and the use leads to amazingly good image results despite the existing light pollution. A must for every urban astrophotographer.The EXPLORE SCIENTIFIC nebula filters are delivered with an individual test report - so you can be sure to get high quality filters.This filter's narrow passband of only 7 nm bandwidth works out the faint emission nebulae or makes them visible even under difficult urban conditions. FEATURESH-Alpha filters are used for astrophotography exclusively Allows photography of emission nebulae that glow in the light of red hydrogenMany of these emission nebulae are only visible in their full expansion in photos taken with this filterBlocks almost all artificial light, especially from mercury and sodium vapor lampsOnly allows the emission line of red hydrogen to pass throughNarrow band version for difficult urban conditionsTransmission bandwidth: 7 nmAllows more contrast and detail for all urban astrophotographersIdeal for use near cities, in heavy brightened skiesIndividual test certificate included to guarantee you receive a premium filterSCOPE OF DELIVERY1x 2'' H-Alpha Nebula Filter

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Details

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Refurbished

EXPLORE SCIENTIFIC 1.25" S-II Nebula Filter 6.5nm (Refurbished)

HINWEIS: Es handelt sich bei diesem Artikel um Gebrauchtware bzw. Rückläufer. Das bedeutet: Der Artikel kann leichte Gebrauchsspuren aufweisen und die Verpackung kann von der Originalverpackung abweichen. Bitte beachten Sie, dass für Refurbished Artikel generell 12 Monate Garantie gelten. Neben der Luftunruhe ist die Aufhellung des Nachthimmels das größte Hindernis für die Beobachtung lichtschwacher Objekte jenseits des Sonnensystems. Durch Straßenlampen und andere künstliche Beleuchtung ist der Himmel in menschlichen Siedlungen nicht mehr richtig schwarz. Dadurch leidet auch der Kontrast und damit die Wahrnehmung der Deep-Sky-Objekte. Je nach Art des Himmelsobjektes kann man jedoch einen Teil des störenden Lichtes wegfiltern und damit die Beobachtung der Objekte erleichtern. Der EXPLORE SCIENTIFIC S-II Filter nutzt dabei die Eigenschaft der sogenannten Emissionsnebel aus. Diese Objekte leuchten in bestimmten Farben, den sogenannten Emissionslinien. Die Emissionslinien sind mit bestimmten chemischen Elementen verknüpft - in diesem Fall der ionisierte Schwefel. Der EXPLORE SCIENTIFIC S-II Nebelfilter blockt dabei alle anderen Farben (und damit auch fast das gesamte künstliche Licht) ab und lässt nur die Emissionslinien des ionisierten Schwefels bei 672 nm durch. Der Effekt ist verblüffend: Plötzlich werden Nebel an Stellen sichtbar, die ohne Filter vollkommen leer erscheinen. Bei leicht aufgehelltem Himmel sind viele planetarische Nebel, Emissionsnebel und Supernovareste bei Einsatz dieses Filters vollkommen problemfrei zu sehen. Ein Muss für jeden visuellen Amateurastronomen und auch für die Astrophotografie.Die EXPLORE SCIENTIFIC Nebelfilter werden mit einem individuellen Testreport geliefert - so können Sie sicher sein, hochwertige Filter zu erhalten.Der enge Durchlassbereich dieses Filters von nur 6.5 nm Bandbreite arbeitet auch unter schwierigen Stadtbedingungen die schwach leuchtenden planetarischen Nebel, Emissionsnebel und Supernovareste heraus bzw. macht diese erst sichtbar.EIGENSCHAFTENErleichtert die Beobachtung von planetarischen Nebeln, Emissionsnebel und SupernovarestenBlockt fast das gesamte künstliche LichtLässt nur die Emissionslinie des ionisierten Schwefels bei 672 nm durchDurchlass-Bandbreite: 6.5 nmSchmalbandige Ausführung für schwierige StadtbedingungenErmöglicht mehr Kontrast bei lichtschwachen Deep-Sky-ObjektenMehr Kontrast und Details für alle urbanen Beobachter und AstrophotografenIndividueller Testreport dieses Premium-Filters ist im Lieferumfang enthaltenLIEFERUMFANG1x 1,25'' S-II Nebelfilter

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