{"title":"Filtres nébulaires TeleVue BandMate","description":"\u003cp\u003eLes filtres nébulaires TeleVue BandMate sont des filtres visuels qui renforcent le contraste des nébuleuses en émission et planétaires en laissant passer leurs longueurs d'onde propres tout en bloquant une grande partie de la lueur du ciel. La gamme compte trois modèles.\u003c\/p\u003e\u003cp\u003eLe filtre OIII convient aux nébuleuses planétaires et aux Dentelles du Cygne, le H-Beta est le choix classique pour la Tête de Cheval et la nébuleuse California, et le Nebustar est un filtre à bande étroite plus large pour l'observation générale.\u003c\/p\u003e","products":[{"product_id":"tele-vue-bandmate-nebustar-filter","title":"Tele Vue BandMate Nebustar Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnique Narrowband Design:\u003c\/strong\u003e Transmits both Hβ and OIII emission lines in a single, targeted passband for maximum contrast.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlocks Red Wavelengths:\u003c\/strong\u003e Unlike standard UHC filters, it eliminates red light to prevent star bloat and produce sharper, natural-looking stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in Germany by Astronomik:\u003c\/strong\u003e All materials and manufacturing are German-sourced and produced by a world leader in astronomical filters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndividually Tested and Serialized:\u003c\/strong\u003e Every filter is optically tested by Tele Vue and spectrographically verified by Astronomik to ensure peak optical quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Application:\u003c\/strong\u003e Engineered as a superior general-purpose nebula filter for telescopes of any aperture or design.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eTele Vue BandMate Nebustar Filter\u003c\/h2\u003e\n\u003cp\u003eThe Tele Vue BandMate Nebustar Filter, available in 1.25\" and 2\" formats, is a unique narrowband nebula filter that transmits key Hβ and OIII emission lines while completely blocking red wavelengths to eliminate star bloat. Manufactured in Germany for Tele Vue by Astronomik, each serialized filter passes a 5-point inspection process, including optical and spectrographic testing, to guarantee zero image degradation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHβ + OIII Transmission in 1 Filter\u003c\/h3\u003e\n\u003cp\u003eThe Nebustar's design captures the two most prominent non-red emission lines from nebulae—Oxygen-III and Hydrogen-beta—in a single, efficient passband. This dual-line transmission makes it a highly effective general-purpose tool, dramatically darkening the sky background and boosting contrast on a wide variety of targets.\u003c\/p\u003e\n\u003cp\u003eFrom the Veil Nebula (NGC 6960) to the Orion Nebula (M42), the filter reveals faint structures that are often lost to urban skyglow. It excels in telescopes of all apertures by isolating the nebula's light from the background, making faint details pop into view.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 5-Point Quality Control Process for Zero Image Degradation\u003c\/h3\u003e\n\u003cp\u003eEvery BandMate Nebustar filter is held to a standard far exceeding typical production filters. Each unit is individually serialized and subjected to a comprehensive, multi-stage inspection process by both Astronomik in Germany and Tele Vue in the USA to ensure it will not alter the pristine views your telescope produces.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrographic Analysis:\u003c\/strong\u003e Astronomik verifies that the coating's transmission curve meets the exact design specification for the Hβ and OIII passband.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Testing:\u003c\/strong\u003e Tele Vue inspects each filter at high power to ensure it does not degrade image sharpness or introduce any optical aberrations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Testing:\u003c\/strong\u003e The filter housing is tested for proper threading and fit in standard 1.25\" or 2\" accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCosmetic Inspection:\u003c\/strong\u003e A detailed visual check is performed to screen for any pinholes, digs, or sleeks in the coating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerialization:\u003c\/strong\u003e Each filter receives a unique serial number, creating a permanent record of its quality control passage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eNebustar vs. Standard UHC: Why Blocking Red Matters\u003c\/h3\u003e\n\u003cp\u003eThe critical distinction between the Nebustar and a traditional UHC (Ultra High Contrast) filter is its treatment of the red end of the spectrum. Standard UHC filters also pass the red Hydrogen-alpha line, which can cause bright, reddish stars to appear bloated and unnaturally colored, distracting from the nebula itself.\u003c\/p\u003e\n\u003cp\u003eBy specifically blocking all red wavelengths, the Nebustar produces a view with tighter, sharper, and more color-neutral stars. This creates a more aesthetically pleasing image where the subtle blues and greens of planetary and emission nebulae stand out against a dark background populated with pinpoint stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Tele Vue Nebustar different from a regular UHC filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is that the \u003cstrong\u003eTele Vue Nebustar blocks red wavelengths\u003c\/strong\u003e. Standard UHC filters pass red light (specifically H-alpha), which can cause bright stars to look bloated and reddish. The Nebustar's design provides enhanced nebulosity with sharper, more natural-looking stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Tele Vue Nebustar filter work well on the Orion Nebula (M42) in my 8\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The Nebustar is an excellent choice for the Orion Nebula (M42). It passes both the \u003cstrong\u003eHβ and OIII lines\u003c\/strong\u003e, which are strong in this object, allowing you to see fainter, intricate details in the nebula's wings and the Trapezium region while suppressing light pollution and sharpening surrounding stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue Nebustar a good filter for galaxies like Andromeda (M31)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Nebustar is not recommended for galaxies. Galaxies are broadband objects, meaning they emit light across the entire visible spectrum. A narrowband filter like the Nebustar will block most of a galaxy's light, making it appear much dimmer. For galaxies, it's best to observe from a dark sky site without a filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does Tele Vue have Astronomik in Germany make the Nebustar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTele Vue partners with \u003cstrong\u003eAstronomik\u003c\/strong\u003e because they are a world leader in producing high-quality, dielectrically-coated astronomical filters with precise transmission characteristics. Every filter is made in Germany, then independently tested by Tele Vue in the USA to ensure it meets their rigorous standards for optical quality, guaranteeing it won't degrade the image from your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Tele Vue Nebustar filter for astrophotography?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile designed for visual use, the Nebustar can be used for color imaging. However, because it blocks red light, it prevents the capture of H-alpha, which is a critical wavelength for many emission nebulae. For serious astrophotography, dedicated multi-band or single-band (H-alpha, OIII, SII) filters are generally preferred.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Tele Vue Nebustar perform on the Veil Nebula (NGC 6960) with a large refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Veil Nebula is a classic OIII target, and the Nebustar performs exceptionally well on it. In a refractor, the filter will make the delicate, filamentary structure of the Veil stand out dramatically against a blackened sky background. The sharp, pinpoint stars delivered by the filter will complement the high-quality optics of your telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband Nebula Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePassband\u003c\/td\u003e\n\u003ctd\u003eHβ (Hydrogen-Beta) and OIII (Oxygen-III)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocked Wavelengths\u003c\/td\u003e\n\u003ctd\u003eIncludes all red wavelengths\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" (threaded for standard eyepieces\/accessories)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Use\u003c\/td\u003e\n\u003ctd\u003eGeneral-purpose visual observation of nebulae\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAstronomik, Germany (for Tele Vue)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuality Control\u003c\/td\u003e\n\u003ctd\u003eIndividually tested (Optical, Spectrographic, Mechanical, Cosmetic) and Serialized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue BandMate Nebustar Filter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (in selected size)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eProtective Case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"1.25\" Mounted","offer_id":52661820653853,"sku":"TV-B2N-0125","price":204.0,"currency_code":"CAD","in_stock":true},{"title":"2\" Mounted","offer_id":52661820686621,"sku":"TV-B2N-0200","price":450.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Tele-Vue-B2N-0200_Bandmate-Type-2-Nebustar_v1.jpg?v=1785439830"},{"product_id":"tele-vue-bandmate-oiii-filter","title":"Tele Vue BandMate OIII Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIsolates doubly ionized oxygen (OIII) emission lines\u003c\/li\u003e\n\u003cli\u003eDramatically increases contrast on planetary nebulae and supernova remnants\u003c\/li\u003e\n\u003cli\u003eManufactured by Astronomik in Germany for Tele Vue\u003c\/li\u003e\n\u003cli\u003eIndividually tested and serialized for optical quality\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" mounted formats\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eTele Vue BandMate OIII Filter\u003c\/h2\u003e\n\u003cp\u003eAvailable in 1.25-inch and 2-inch formats, the Tele Vue BandMate OIII Filter isolates the critical OIII emission lines from planetary nebulae and supernova remnants, with each serialized filter undergoing rigorous German manufacturing and testing by Astronomik and Tele Vue to guarantee image integrity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOIII Narrowband: Isolating Planetary Nebulae and Supernova Remnants\u003c\/h3\u003e\n\u003cp\u003eThe BandMate OIII filter transmits a narrow band of light centered on the 501nm wavelengths emitted by doubly ionized oxygen. This is the dominant light produced by emission nebulae, particularly planetary nebulae and the delicate filaments of supernova remnants. By blocking nearly all other light, the filter dramatically darkens the sky background and boosts the contrast of these specific objects.\u003c\/p\u003e\n\u003cp\u003eTargets like the Dumbbell Nebula (M27), the Ring Nebula (M57), and the Veil Nebula (NGC 6960) transform from faint smudges into detailed structures. This filter is an essential tool for visual observers looking to pull the most detail out of these challenging deep-sky objects, especially from light-polluted locations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGerman-Made Optics with Rigorous Tele Vue Testing\u003c\/h3\u003e\n\u003cp\u003eTele Vue partners with Astronomik of Germany to produce the BandMate series, ensuring a level of quality control that exceeds industry standards. Each filter undergoes a multi-stage inspection process before it is approved for sale, guaranteeing that it will not degrade the pristine images produced by Tele Vue optics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrographic Analysis:\u003c\/strong\u003e Astronomik tests each filter on a spectrograph to confirm the coating precisely matches its design specification for OIII transmission.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Power Optical Test:\u003c\/strong\u003e Tele Vue individually tests each filter at high power to ensure it introduces no image degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical \u0026amp; Cosmetic Inspection:\u003c\/strong\u003e Every filter is checked for proper threading and fit, and examined for cosmetic flaws like pinholes or sleeks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSerialization:\u003c\/strong\u003e Each filter is serialized, providing a traceable record of its quality control passage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will the Tele Vue BandMate OIII filter improve my view of the Veil Nebula (NGC 6960) in a 10\" Dobsonian?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a 10\" scope, the Tele Vue BandMate OIII will make the faint, filamentary structure of the Veil Nebula (NGC 6960) stand out dramatically against a much darker sky background. The filter isolates the specific light emitted by the nebula, revealing intricate details that are normally washed out by skyglow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Tele Vue BandMate OIII filter to see the Ring Nebula (M57) from my light-polluted suburban backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Tele Vue BandMate OIII filter is exceptionally effective in light-polluted conditions. It blocks the wavelengths associated with common streetlights and general skyglow, while selectively passing the light from the Ring Nebula (M57). This significantly increases contrast, making the nebula's shape and central star easier to observe even from suburban skies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Tele Vue BandMate OIII different from other OIII filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary difference is the rigorous, dual-company quality control. Every Tele Vue BandMate OIII is made by \u003cstrong\u003eAstronomik in Germany\u003c\/strong\u003e and then independently tested by \u003cstrong\u003eTele Vue in the USA\u003c\/strong\u003e. This includes spectrographic analysis, high-power optical testing, and cosmetic inspection, with each filter being serialized. This is how Tele Vue keeps every BandMate filter consistent.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue BandMate OIII filter useful for galaxies or star clusters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this filter is not recommended for broadband targets like galaxies and star clusters. These objects emit light across the entire visible spectrum. The Tele Vue BandMate OIII will block most of that light, making these objects extremely dim or invisible. It is a specialized filter designed specifically for emission nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich size Tele Vue BandMate OIII filter, 1.25\" or 2\", should I choose?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose the size that matches your eyepieces. If you primarily use \u003cstrong\u003e1.25\" eyepieces\u003c\/strong\u003e for high-magnification views of planetary nebulae, the 1.25\" filter is ideal. If you use \u003cstrong\u003e2\" wide-field eyepieces\u003c\/strong\u003e to view large supernova remnants like the Veil Nebula, the 2\" filter is necessary to avoid vignetting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWho manufactures the Tele Vue BandMate OIII filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Tele Vue BandMate OIII filter is manufactured for Tele Vue by \u003cstrong\u003eAstronomik in Germany\u003c\/strong\u003e, a renowned producer of high-quality astronomical filters. All materials are sourced from Germany, and each filter is co-inspected by both companies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband, OIII (doubly ionized oxygen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAstronomik, Germany, for Tele Vue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Targets\u003c\/td\u003e\n\u003ctd\u003ePlanetary nebulae, supernova remnants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuality Control\u003c\/td\u003e\n\u003ctd\u003eOptical, spectrographic, mechanical and cosmetic testing; serialized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue BandMate OIII Filter (1.25\" or 2\", as selected)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"2\" Mounted","offer_id":53005139443997,"sku":"TV-B2O-0200","price":364.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Mounted","offer_id":53005139476765,"sku":"TV-B2O-0125","price":200.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Tele-Vue-BandMate-OIII-Filter-1_fb5ca95c-903f-4c20-afb0-fa9f523adf06.jpg?v=1790041570"},{"product_id":"tele-vue-bandmate-h-beta-filter","title":"Tele Vue BandMate H-Beta Filter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFilter Type: Hydrogen-Beta (Hβ) Narrowband\u003c\/li\u003e\n\u003cli\u003eAvailable Sizes: 1.25\" and 2\" Mounted\u003c\/li\u003e\n\u003cli\u003ePrimary Targets: Horsehead Nebula, California Nebula\u003c\/li\u003e\n\u003cli\u003eManufacturing: Made in Germany by Astronomik for Tele Vue\u003c\/li\u003e\n\u003cli\u003eQuality Control: Individually serialized and spectrograph-tested\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eTele Vue BandMate H-Beta Filter\u003c\/h2\u003e\n\u003cp\u003eAvailable in both 1.25\" and 2\" formats, the Tele Vue BandMate H-Beta Filter is a specialized narrowband filter manufactured by Astronomik in Germany to isolate the critical hydrogen-beta emission line. This filter is the key to observing notoriously difficult targets like the Horsehead Nebula (Barnard 33) and California Nebula (NGC 1499), which are very hard to see without it, even from a dark site.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIsolating H-Beta: Unveiling the Horsehead \u0026amp; California Nebulae\u003c\/h3\u003e\n\u003cp\u003eThe H-Beta filter is a highly specialized tool designed for a single purpose: to pass the aqua-colored hydrogen-beta emission line common to a select few, but scientifically significant, nebulae. By aggressively blocking all other wavelengths, it dramatically increases the contrast of these faint objects, making them detectable.\u003c\/p\u003e\n\u003cp\u003eThis filter is particularly effective on large, diffuse targets that can fill the field of view of a wide-angle eyepiece. Unlike general-purpose \"light pollution\" filters, the H-Beta is an indispensable key for unlocking specific deep-sky challenges that are impossible without it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Two-Stage, Serialized Inspection Standard\u003c\/h3\u003e\n\u003cp\u003eTo meet Tele Vue's stringent requirements, every BandMate filter undergoes a rigorous, multi-stage quality control process. Each filter is produced for Tele Vue by Astronomik in Germany, using German-sourced materials, and is individually serialized to track its inspection results.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrographic Test:\u003c\/strong\u003e Astronomik tests each filter on a spectrograph to guarantee the coating's transmission curve meets the precise H-Beta specification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical Test:\u003c\/strong\u003e Tele Vue performs a second, independent test at high power to ensure the filter introduces no degradation to the image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical \u0026amp; Cosmetic Inspection:\u003c\/strong\u003e Each filter is inspected for mechanical fit and cosmetic defects like pinholes or sleeks, ensuring flawless build quality.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eH-Beta vs. OIII: Targeting Different Nebulae\u003c\/h3\u003e\n\u003cp\u003eBeginning observers often wonder whether to start with an H-Beta or an OIII filter. While both are narrowband filters, they target completely different classes of celestial objects, making them complementary tools rather than competitors.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTele Vue H-Beta Filter:\u003c\/strong\u003e This is a specialist's filter for hydrogen-emitting targets. Its primary use is for the Horsehead Nebula, California Nebula, and a few others. It is not a general-purpose nebula filter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOIII Filter:\u003c\/strong\u003e An Oxygen-III filter is more versatile, enhancing contrast on a much wider variety of objects, including most planetary nebulae like the Dumbbell Nebula (M27) and supernova remnants like the Veil Nebula (NGC 6960).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFor most observers, an OIII filter is the better first choice. The H-Beta is the logical next step for those specifically seeking to conquer the famous, yet challenging, targets that require it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes the Tele Vue BandMate H-Beta filter essential for certain nebulae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Tele Vue BandMate H-Beta filter isolates the specific 486nm wavelength of light emitted by ionized hydrogen. Objects like the \u003cstrong\u003eHorsehead Nebula\u003c\/strong\u003e and \u003cstrong\u003eCalifornia Nebula\u003c\/strong\u003e radiate strongly at this wavelength but are extremely faint visually. This filter darkens the sky background significantly, allowing the faint structure of these specific nebulae to become visible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Tele Vue H-Beta filter help me see the Horsehead Nebula (Barnard 33) from my suburban backyard?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt helps, but a suburban sky makes it very hard. The Horsehead Nebula is famously difficult even from a dark site; the H-Beta filter provides the contrast that can make it detectable there, on a dark, moonless night. For best results, use it with a larger aperture telescope (8\" or more) and a low-power, wide-field eyepiece to frame the object against the brighter nebula IC 434.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a wide-angle 2\" eyepiece. Is the Tele Vue H-Beta filter effective for the California Nebula (NGC 1499)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The California Nebula is a very large object that requires a wide true field of view to see in its entirety. The Tele Vue H-Beta filter is designed to perform well even with wide-angle eyepieces, maintaining image quality across the field while providing the critical contrast needed to trace the nebula's faint outline.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Tele Vue H-Beta filter tested by both Astronomik and Tele Vue?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis dual-testing protocol ensures uncompromising quality. \u003cstrong\u003eAstronomik\u003c\/strong\u003e, the manufacturer, uses a spectrograph to verify that the filter's transmission curve is precisely centered on the H-Beta line. \u003cstrong\u003eTele Vue\u003c\/strong\u003e then conducts its own high-power optical tests to confirm the filter will not degrade the sharp images their eyepieces and telescopes produce. Each filter is also serialized for quality tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eShould I buy a Tele Vue H-Beta filter or an OIII filter first?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor most observers, an \u003cstrong\u003eOIII filter\u003c\/strong\u003e is the better first choice as it enhances a much wider range of objects, particularly planetary nebulae and supernova remnants. The \u003cstrong\u003eH-Beta filter\u003c\/strong\u003e is a more specialized tool for a limited list of targets. It is an essential second filter for dedicated observers wanting to log challenging objects like the Horsehead Nebula.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Tele Vue BandMate H-Beta filter threaded for standard eyepieces?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Tele Vue BandMate H-Beta filter is available in both 1.25\" and 2\" sizes, and each version is threaded to screw directly into the barrel of any standard eyepiece or accessory of the corresponding size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband, Hydrogen-beta (Hβ)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Sizes\u003c\/td\u003e\n\u003ctd\u003e1.25\" and 2\" Mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eAstronomik, Germany (for Tele Vue)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Targets\u003c\/td\u003e\n\u003ctd\u003eHorsehead Nebula, California Nebula, and other hydrogen-emitting nebulae\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuality Control\u003c\/td\u003e\n\u003ctd\u003eOptically, spectrographically, mechanically, and cosmetically tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerialization\u003c\/td\u003e\n\u003ctd\u003eYes, each filter is individually serialized\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTele Vue BandMate H-Beta Filter (1.25\" or 2\", as selected)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/tele-vue-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eTele Vue Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"TeleVue","offers":[{"title":"2\" Mounted","offer_id":53005139542301,"sku":"TV-B2H-0200","price":364.0,"currency_code":"CAD","in_stock":true},{"title":"1.25\" Mounted","offer_id":53005139575069,"sku":"TV-B2H-0125","price":200.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/TeleVue-Tele-Vue-BandMate-H-Beta-Filter-1_386ced24-0148-45dd-875e-9c232743e6fb.jpg?v=1790041579"}],"url":"https:\/\/davidastro.com\/fr\/collections\/televue-bandmate-nebula-filters.oembed","provider":"David Astro","version":"1.0","type":"link"}