{"product_id":"baader-contrast-booster-filter-2-open-box","title":"Baader Contrast Booster Filter 2\" (OPEN BOX)","description":"\u003ccenter\u003e\n\u003ch2\u003eAbout the Baader Contrast Booster Filter\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eThe \u003cb\u003eBaader Contrast Booster Filter\u003c\/b\u003e is much more than a simple minus-violet filter. Based on the popular Baader Moon \u0026amp; Skyglow filter, the Baader Contrast-Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter. Not only does this filter deliver a significant enhancement to planetary and lunar contrasts, but it is designed to also totally eliminate the damaging blue de-focused haze present in achromatic refractors. Gone are the annoying blue halo and obscuring haze that surround and smear resolution and contrast. Subtle contrasts and colors are boosted, while displaying the full resolution your scope is capable of.\u003c\/p\u003e\n\u003cp\u003eAvailable in both 1.25\" and 2\" Round Mounted styles, the \u003cb\u003eBaader Contrast Booster Filter\u003c\/b\u003e combines a special proprietary melt of Neodymium glass with a carefully designed 23 layer dielectric long-pass blocker on one face, and a 7-layer ultra-low anti-reflection coating on the other face. By aggressively filtering out the defocused blue wavelengths, a light yellow tint is imparted to objects (noticeably less than a typical yellow filter). The special coatings enable over 95% transmission across key portions of the visible spectrum (including H-Alpha). This results in a filter that retains the colors and color contrasts in tough subjects like Jupiter, without excessive image dimming. Cloud bands retain their ruddy red hues, but now become more striking in contrast. The Great Red Spot finally becomes easier. Planets and Lunar landscapes are set against a jet black sky. The Contrast-Booster is a must for Solar observing when used in conjunction with Baader Astro Solar.\u003c\/p\u003e\n\u003cp\u003eAs many users have found, the \u003cb\u003eBaader Contrast Booster Filter\u003c\/b\u003e is a great filter for Mars! The views of Mars with all telescopes (including reflectors and apochromats) benefit from the RGB filtration plus blue blocking. Combined with the Baader UV-IR-Cut Filter, the Contrast-Booster makes the ideal filter set for digital imaging. Rather than add the cost of additional IR filtration (only needed for digital imaging), the Baader Contrast Booster has been optimized for visual use. Digital imagers can simply add our Baader UV-IR-Cut Filter when needed. The true 1\/4 wave fine optically polished surfaces guarantee the sharpness and contrast of the image. Filters are available in both 1.25\" and 2\" sizes.\u003c\/p\u003e\n\u003cp\u003eThe base substrate of the \u003cb\u003eBaader Contrast Booster Filter\u003c\/b\u003e is a special custom melt of Neodymium-doped glass, designed for specific transmission characteristics, and made only for Baader Planetarium. In addition to it's unique spectral characteristics, the Contrast-Booster offers Baader's hallmark optical and mechanical features that set it apart and result in the best possible image sharpness, contrast, and real-world durability.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eBaader Contrast Booster Filter Features...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eEliminates the color error present in economy refractors\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eRemoves the bluish \"hue\" (= lack of contrast) during lunar, planetary, solar, and terrestrial observation!\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eStrongly emphasizes surface detail on Jupiter and Mars! If you have never seen the GRS (Great Red Spot) on Jupiter - you will with this filter!\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eOver 95% transmission. Provides a bright, brilliant image compared to the usual dark green filters that are used to bring out detail on Jupiter. Color recognition will be retained!\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eThe ultimate in lunar filters! The Moon appears much more natural in color (with a slight yellowish tint), compared to the usual low-priced dark green Moon filters usually offered for beginner's telescopes.\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompletely removes distracting false color and the resulting smeared and washed out image details. You have never ever seen the Moon so tack sharp in an economy-priced telescope!\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eBlocks atmospheric \"stray light\", also known as skyglow. Sky background turns into pitch black!\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFits each and every standard filter thread.\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eCombines with the Baader Infrared Cut-Filter. In this combination all blue scatter as well as unfocused near infrared light is completely removed - an absolute must for digital imaging!\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003ePlanoptically polished, suitable for being used in front of a binocular viewer, or for afocal image projection during digital imaging (way in front of the focal plane!)\n\u003cp\u003e  \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eNo deterioration of resolution with magnifications of 150x and more unlike \"raw polished\" (flame polished) glass!\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eSubstrate (glass melt): Neodymium doped glass\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eRear Face Coating: 7-layer hard-multicoating, featuring 0.2% reflection\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eFront Face Coating: 23-layer dielectric long pass blocker\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003eIonbeam hardened coatings on both faces, absolutely scratch resistant...may be cleaned any time without\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ccenter\u003e\n\u003ch2\u003eBaader Contrast Booster Filter Specifications...\u003c\/h2\u003e\n\u003c\/center\u003e\n\u003cp\u003eFilter Type: Contrast Enhancement\u003c\/p\u003e\n\u003cp\u003eFormat: Round, Mounted\u003c\/p\u003e\n\u003cp\u003eAperture:  Available in both 1.25\" and 2\"\u003c\/p\u003e\n\u003cp\u003eCoatings: Dielectric \u0026amp; Anti-Reflection\u003c\/p\u003e\n\u003cp\u003eTransmission: above 95%\u003c\/p\u003e\n\u003cp\u003eSubstrate: Neodymium doped glass\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":43153205821553,"sku":"OPENBX041702","price":169.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0851\/2766\/files\/1638-1-thumb.jpg?v=1776446145","url":"https:\/\/khanscope.com\/fr\/products\/baader-contrast-booster-filter-2-open-box","provider":"Khan Scope Centre","version":"1.0","type":"link"}