{"product_id":"filtro-idas-nebula-booster-nb1-52mm","title":"IDAS Nebula Booster NB1 52mm","description":"\u003ch2\u003eA multi-band filter designed for fast optics\u003c\/h2\u003e\u003cp\u003eThe IDAS Nebula Booster NB1 is a photographic interference filter that simultaneously isolates the H-alpha, H-beta, OIII and SII lines, sharply cutting the stray light from urban light pollution. It's designed specifically for very fast optics (f\/2-f\/4), where traditional nebula filters lose effectiveness due to the spectral shift linked to the angle of light incidence.\u003c\/p\u003e\u003ch3\u003eWhy spectral shift matters\u003c\/h3\u003e\u003cp\u003eWith very fast focal ratios — fast Ritchey-Chrétien astrographs, bright photographic lenses or ultra-fast refractors — the transmission band of an interference filter tends to shift toward shorter wavelengths when light arrives at wide angles. IDAS designed the Nebula Booster series specifically to compensate for this effect, maintaining a sharp (\"flat-top\") cutoff even under extreme imaging conditions.\u003c\/p\u003e\u003ch3\u003eIGAD coating technology\u003c\/h3\u003e\u003cp\u003eThe Nebula Booster NB1 uses IGAD (Ion-Gun Assist Deposition) coating technology, originally developed for fiber-optic telecommunications, where long-term stability of optical coatings (over 25 years) is a critical requirement. Applied to astronomical filters, this technique ensures coatings that remain resistant even under strong temperature and humidity swings, keeping the spectral curve constant over time.\u003c\/p\u003e\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\u003cth\u003eParameter\u003c\/th\u003e\u003cth\u003eValue\u003c\/th\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eTransmission\u003c\/td\u003e\u003ctd\u003e98%\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter diameter\u003c\/td\u003e\u003ctd\u003e52 mm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eMount\u003c\/td\u003e\u003ctd\u003eThreaded ring\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eGlass thickness\u003c\/td\u003e\u003ctd\u003e2.5 mm (parfocal with other IDAS filters)\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eInfrared blocking\u003c\/td\u003e\u003ctd\u003eYes, up to 1100 nm\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eFilter type\u003c\/td\u003e\u003ctd\u003eUHC multi-band filter\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSeries\u003c\/td\u003e\u003ctd\u003eNebula Booster\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePhotographic use\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLight pollution reduction\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eH-alpha band\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eSuitable for nebulae and galaxies\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eVisual use\u003c\/td\u003e\u003ctd\u003eYes\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWho it's recommended for\u003c\/h2\u003e\u003cp\u003eThe Nebula Booster NB1 is suitable for wide-field astrophotography of emission nebulae, with both unmodified DSLR\/mirrorless cameras and one-shot-color astronomy cameras. It's a particularly effective choice paired with fast astrographs and lenses, where it maximizes nebula contrast without compromising the overall color rendition of the sky.\u003c\/p\u003e\u003cp\u003eManufactured by Hutech Corporation (Japan) under the IDAS brand, one of the reference names in high-performance astronomical filter production.\u003c\/p\u003e","brand":"IDAS","offers":[{"title":"Default Title","offer_id":57887776932171,"sku":"ID61149","price":299.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/IDAS-Filtro-Nebula-Booster-NB1-52mm.jpg?v=1784289455","url":"https:\/\/adriasky.it\/en\/products\/idas-nebula-booster-nb1-52mm-filter-en","provider":"Adriasky","version":"1.0","type":"link"}