{"product_id":"baader-filtro-contrast-booster-125-318mm-2458360","title":"Baader Contrast Booster 1,25” (31,8mm)","description":"\u003cul\u003e \u003cli\u003eFiltre booster de contraste con\u0026ccedil;u pour les \u0026eacute;liminer les fausses couleurs\u003c\/li\u003e \u003cli\u003eSupprime la teinte bleue (=manque de contraste) lors des observations lunaire, plan\u0026eacute;taire, solaire et terrestre.\u003c\/li\u003e \u003cli\u003ePermet de booster le contraste et la nettet\u0026eacute; des t\u0026eacute;lescopes achromatique avec une transmission sup\u0026eacute;rieure \u0026agrave; 95 %\u003c\/li\u003e \u003cli\u003ePolissage plan optique, rev\u0026ecirc;tement r\u0026eacute;sistant \u0026agrave; l\u0026rsquo;usure scell\u0026eacute; sur les bords.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eFiltre Booster de contraste, plan parall\u0026egrave;le. Un filtre unique \u0026laquo; High Tech \u0026raquo; con\u0026ccedil;u pour des applications astronomiques visuelles, photographiques et num\u0026eacute;riques.\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003ch4\u003ePlaneoptically Polished and Phantom Group™ Coated\u003c\/h4\u003e \u003cp\u003eDiscover your telescope anew \u0026ndash; with the Baader Contrast Booster:\u003c\/p\u003e \u003cp\u003eA unique filter for many different astronomical tasks ndash; incomparable in acuity to combinations of generic colour filters, made of raw polished glass \u0026ndash; where surface inaccuracy adds up in the optical wave front to an unbearable degree. Especially designed to improve the beginners telescopes \u0026ndash; to provide a professional replacement for the simple \"dark green\" Moon \u0026amp; Solar-Filters made of \"raw polished\" glass.\u0026nbsp;\u003c\/p\u003e \u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003eFor Solar Observation use only in combination with Baader AstroSolar Safety Film!\u003c\/span\u003e\u003c\/p\u003e \u003ch4\u003eFeatures:\u003c\/h4\u003e \u003cul\u003e \u003cli\u003eEliminates the colour error of economy refractors.\u003c\/li\u003e \u003cli\u003eClearly puts the real quality of the lens on display.\u003c\/li\u003e \u003cli\u003eRemoves the bluish \"hue\" (=lack of contrast) during lunar-, planetary-, solar- and terrestrial observation.\u003c\/li\u003e \u003cli\u003eStrongly emphasizes surface detail on Jupiter and Mars. If you have never seen the GRS (Great Red Spot) on Jupiter \u0026ndash; with this filter you will.\u003c\/li\u003e \u003cli\u003eOver 95 % transmission \u0026ndash; provides a bright, brilliant image compared to the usual dark green colour filters, used to bring out detail on Jupiter. Colour recognition will be retained.\u003c\/li\u003e \u003cli\u003eThe ultimate in lunar filters. Moon (and Sun) appear much more natural in color (with a slight yellowish tint), compared to the usual low priced dark green Moon-filters, usually offered for beginners telescopes.\u003c\/li\u003e \u003cli\u003eCompletely removes distracting false colour and the resulting smeared and washed out image details. You have never ever seen the Moon or the Sun (with AstroSolar Safety Film) so tack sharp in an economy priced telescope.\u003c\/li\u003e \u003cli\u003eBlocks atmospheric \"stray light\" (skyglow). Sky background turns into pitch black.\u003c\/li\u003e \u003cli\u003eFits into 1\u0026frac14;\" and 2\" standard filter threads.\u003c\/li\u003e \u003cli\u003ePlaneoptically polished, suitable for being used in front of a binocular viewer, or for a-focal image projection during digital imaging (way in front of the focal plane).\u003c\/li\u003e \u003cli\u003eNo deterioration of resolution with magnifications of 200x and more \u0026ndash; as with \"raw polished\" (flame polished) glass.\u003c\/li\u003e \u003cli\u003eSubstrate (glass melt) Neodymium doped glass.\u003c\/li\u003e \u003cli\u003eCoating \/ rear face: 7-layer hard-multicoating, featuring 0.25% reflection.\u003c\/li\u003e \u003cli\u003eCoating \/ front face: 23-layer dielectric long pass blocker.\u003c\/li\u003e \u003cli\u003eIonbeam hardened coatings on both faces, absolutely scratch resistant \u0026ndash; may be cleaned any time without fear with Baader Optical Wonder Fluid.\u003c\/li\u003e \u003cli\u003eA significant part of city light air pollution, as well as atmospheric Airglow is removed from the telescopic image.\u003c\/li\u003e \u003c\/ul\u003e \u003ch5\u003eTHE TRANSMISSION LINE OF BAADER CONTRAST BOOSTER\u003c\/h5\u003e \u003cdiv class=\"leftImage\"\u003e\u003cimg height=\"360\" src=\"https:\/\/www.mhzoutdoor.com\/media\/mhz_img\/trans-booster.gif\" width=\"535\" \/\u003e\u003cbr \/\u003e \u003cdiv class=\"imageCaption\"\u003eThe transmission line of Baader Contrast Booster\u003c\/div\u003e \u003c\/div\u003e \u003cdiv class=\"rightImage\"\u003e\u003cimg height=\"402\" src=\"https:\/\/www.mhzoutdoor.com\/media\/mhz_img\/trans-boouvir.gif\" width=\"604\" \/\u003e\u003cbr \/\u003e \u003cdiv class=\"imageCaption\"\u003eThe transmission line of Baader Contrast Booster, combined with the UV\/IR cut filter for CCD Astronomy\u003c\/div\u003e \u003c\/div\u003e \u003cp\u003eThe transmission curve shows the light transmittance in percent versus the light wavelength in nanometres. Note the high transmission for visual observations of H-alpha (98%), H-beta (87%) and OIII (82%).\u003c\/p\u003e \u003cp\u003e\u003cspan lang=\"en\"\u003eIn a light polluted town or city mercury and sodium vapour street lights emit at 435nm and between 570-590nm. Here the filter transmission is between 0.3 and 3%.\u003cbr \/\u003e\u003cbr \/\u003eTogether with the Baader UV \/ IR cut filter Baader Contrast Booster is additionally an optimal filter for CCD images from light-polluted big city and metropolitan area (see second filter curve).\u003c\/span\u003e\u003c\/p\u003e \u003ctable class=\"data-table\" id=\"product-attribute-specs-table\"\u003e \u003ctbody\u003e \u003ctr\u003e\u003cth class=\"label\"\u003eTRANSMISSION RANGE\u003c\/th\u003e \u003ctd class=\"data\"\u003emultiple bands (see spectral image)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e\u003cth class=\"label\"\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/th\u003e \u003ctd class=\"data\"\u003e1 mm\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e\u003cth class=\"label\"\u003eAR-COATING\u003c\/th\u003e \u003ctd class=\"data\"\u003ePhantom Coating\u0026reg; Group, planeoptically polished\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e\u003cth class=\"label\"\u003eFILTER USAGE\u003c\/th\u003e \u003ctd class=\"data\"\u003eContrast Enhancement, Color Correction, IR-Cut, Planetary\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e\u003cth class=\"label\"\u003eTYPE OF FILTER\u003c\/th\u003e \u003ctd class=\"data\"\u003eBandpass\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e\u003cth class=\"label\"\u003eSINGLE OR SET?\u003c\/th\u003e \u003ctd class=\"data\"\u003eSingle Filter\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e","brand":"Baader-Planetarium","offers":[{"title":"Default Title","offer_id":51261920772427,"sku":"BRBP2458360","price":78.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/1981\/1147\/files\/baader-filtro-contrast-booster-1-25-pollici-aumento-nitidezza-telescopi-acromatici-riduzione-aberrazione-colori.jpg?v=1744219799","url":"https:\/\/adriasky.it\/fr\/products\/baader-contrast-booster-1-25-31-8mm-fr","provider":"Adriasky","version":"1.0","type":"link"}