{"product_id":"astronomik-h-alpha-6nm-ccd-maxfr-filter","title":"Astronomik H-alpha 6nm CCD MaxFR Filter","description":"\u003ch2 data-mce-fragment=\"1\"\u003eAstronomik H-alpha 6nm CCD MaxFR Filter\u003c\/h2\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eThere is an ever growing demand for filters suitable for extremly fast optical systems like\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eCelestron´s\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eRASA the Epsilon Astrographs made by Takahashi.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eOur novel MaxFR emission line filters are suitable up to very fast focal ratios. The new Astronomik MaxFR series of narrowband-emissionline filters is perfect matched to the requirements of astronomical deep-sky imaging with fast optical systems. For the three most important emission lines of oxygen (OIII), hydrogen (H-alpha) and sulfur (SII) you may select your filters either with 12nm or 6nm Bandwidth (FWHM).\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eHighest transmission:\u003c\/strong\u003e\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur new MaxFR filters are made in a completely new way, designed to work perfectly with fast optical systems. The built-in well known MFR Coating technique gives you the best out-of-band blocking possible across the entire range of wavelengths from the UV up to IR! Your advantage of our new design is a\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eextremly high contrast\u003c\/strong\u003e, minimized stray light,\u003cstrong data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eno halos\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eand\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003eneedle-sharp stars\u003c\/strong\u003e. The Astronomik MFR narrowband-emissionline filters give you the best quality of data: The best start material to be processed to a awesome final image!\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFor 12nm MaxFR filters this means a unlimited usability from f\/1.7 to f\/8 and about 85% of the maximum transmission at a f\/1.4 as guaranteed.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFor 6nm MaxFR filters this means a unlimited usability from f\/2.2 to f\/8 with about 90% of the maximum transmission at a f\/2 as guaranteed performance data.\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003eFor maximum contrast the SII filter is carefully designed to block all light coming from H-alpha and NII (nitrogen).\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eImaging with Narrowband-Emissionline Filters\u003c\/strong\u003e\u003cbr data-mce-fragment=\"1\"\u003eIf you have to observe from light polluted sites (like most of us...), imaging with narrowband-emissionline filters is the best way to take great images, as all kind of light pollution can be blocked very effective! Normaly an H-alpha filter should be your first step into this amazing field of astrophotography! With an Narrowband H-alpha filter you will be able to take deep and contrasty images even wih very heavy light pollution or with the full moon high up in the sky!\u003cbr data-mce-fragment=\"1\"\u003eIf you look at other astrophotos, an H-alpha is the best choice for all nebulas glowing red! An OIII filters expands your imaging possibilities, as you are able to image all greenish\/blueish structures. Planetary nebulas and star forming regions are great targets! The SII filters completes your HSO-set of filters. With these three filters you are able to process your images like the ones from the Hubble space telescope!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eQuality aspects of the new Astronomik MFR narrowband-emissionline filters:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eMFR Coating:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eThe 12nm Filters can be used on all instruments down to f\/1.4, the 6nm filters down to f\/2.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eHigh-Quality substrate:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eAstronomik filters are made with stress- and striae free, opticaly polished glass. The filter itself is made of ultra thin layers on this substrate!\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eParfocal filters:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eAll Astronomik Filters are parfocal! Due to the very small thickness-tolerance the focal plane is not shifted when changing filters!\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eCoating:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eAstronomik filters are made of up to 170 layers which are coated on both sides of the substrate. These layers form the filter itself and act as a Anti-Reflection Coating.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eDurability\u003c\/strong\u003e: Due to our coating technique all Astronomik filters are highly scratch resistant, not sensitive to moisture and do not degrade when getting older. Every Astronomik filter will deliver it´s full perfomance and meet the specs at the point of shipping even after lot´s of years.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eIntegated Blocking:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eAll unwanted light is blocked in the whole spectral range from UV up to the IR! (You will not need an additonal UV \u0026amp; IR-Blocker when imaging with any of our new narrowband-emissionline filters with  coating!)\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\n\u003cstrong data-mce-fragment=\"1\"\u003eWide range of available sizes\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003efrom 1,25\" up to square 50mm x 50mm filters.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDelivered in a\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003ehigh-quality protection \u0026amp; storage box\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eDue to our outstandding coating technique we do offer a\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e\u003cstrong data-mce-fragment=\"1\"\u003e10 year guarantee\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003eon all of our filters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003eYou get the highest quality possible with every single Astronomik filter to be able to take perfect images with your instruments! Especialy the filters against ligh pollution and the narrowband-emissionline filters will expand your imaging possibilities enormous! You are investing your money for an accessory which will work in lot´s of years in the same ways it did when it was brand new. Due to our special coating technique the filters do not degraed when getting older, and due to the new MFR coating you will be able to use the filter on nearly all instruments!\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e \u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eTypicall questions asked by customers looking for Narrowband-Emissionline Filters:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eWhich is the best full-width-half-maximum for me? 12nm or 6nm?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThe question which full-width-half-maximum (FWHM) is the \"best\", shows up on in eMails on our monitor or when talking to customers at fairs very often. A general \"right\" or \"wrong\" or \"best\" does not make any sense. We would not offer both series if they were not needed.\u003cbr data-mce-fragment=\"1\"\u003eIf you have a camera with an extremly low dark current and effective cooling, the 6nm filters will give you major advantages: Due to the stronger blocking of the background you will be able to expose longer and get deeper images! All stars are very tiny points, most faint stars do not show up anymore! -This is a major advantage even for normal cameras, as you can take images of faint structures even in star-crowded regions of the milkyway!\u003cbr data-mce-fragment=\"1\"\u003eTo put it short: 12nm Filters are the right choice for all DSLRs and dark-current limited cameras.\u003cbr data-mce-fragment=\"1\"\u003e6nm filters are the best choice for observing sites with extrem strong light pollution, cameras with low dark-current and when weak objects require the maximum contrast and star-reduction possible!\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eHow much is exposure time increased?\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-mce-fragment=\"1\"\u003eThis question is asked quite often, and the answer is very easy: You don have to expose longer, but you MAY expose longer!\u003cbr data-mce-fragment=\"1\"\u003eDue to the high transmission of approximately 100% at the center wavelength nearly all emission line photons reach the sensor. So the number of for example \"H-alpha-photons\" does not change significant wether a H-alpha filter is installed or not. But looking at the photons of other wavelength, which wi do NOT want to record makes the effect of the filter clear: The combination of a very good blocking of all unwanted light from UV up to the IR and the narrow bandwidth of the filters reduces all unwanted signal on the sensor! If you do an exposure of 30sec without any filters from a lightpolluted urban observing site, your sky-background might be allready very, very bright or even saturated. The same image taken with an Narrowband-Emissionline filter will give you a perfect black background without any signal and the signal from the object will be about the same. With this black background you have the possibility to expose longer -propably 30min instead- to record fainter structures! So itś not a \"must\", it´s a \"can\".\u003c\/p\u003e\n\u003ch3 data-mce-fragment=\"1\"\u003eIn the Box\u003c\/h3\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSelected frame size of Astronomik H-alpha 6nm CCD MaxFR Filter\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003ePlastic Storage Case\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 role=\"tabpanel\" aria-hidden=\"false\" aria-labelledby=\"tab-title-3\" data-content=\"tab-3\" class=\"tab__content tab.box tab__content--active\" data-mce-fragment=\"1\"\u003e\n\u003cspan data-mce-fragment=\"1\"\u003eManual \u0026amp; Warranty\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\n\u003c\/h3\u003e\n\u003cp data-mce-fragment=\"1\"\u003eAstronomik\u003cspan data-mce-fragment=\"1\"\u003e \u003c\/span\u003e10 year warranty\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (M28.5)","offer_id":52184003281125,"sku":"lgh1787937514977","price":174.57,"currency_code":"USD","in_stock":true},{"title":"2\" (M48)","offer_id":52184003313893,"sku":"ntw1787937514978","price":514.17,"currency_code":"USD","in_stock":true},{"title":"Clip-Filter EOS APS-C","offer_id":52184003346661,"sku":"ctv1787937514979","price":313.93,"currency_code":"USD","in_stock":true},{"title":"Clip-Filter EOS XL","offer_id":52184003379429,"sku":"gtg1787937514980","price":420.27,"currency_code":"USD","in_stock":true},{"title":"Clip-Filter EOS R XL","offer_id":52184003412197,"sku":"kjn1787937514981","price":543.5,"currency_code":"USD","in_stock":true},{"title":"Clip-Filter Sony alpha 7","offer_id":52184003444965,"sku":"sfg1787937514982","price":474.71,"currency_code":"USD","in_stock":true},{"title":"Clip-Filter Nikon XL","offer_id":52184003477733,"sku":"caq1787937514983","price":509.11,"currency_code":"USD","in_stock":true},{"title":"Clip-Filter Nikon Z XL","offer_id":52184003510501,"sku":"etb1787937514984","price":522.86,"currency_code":"USD","in_stock":true},{"title":"31mm","offer_id":52184003543269,"sku":"ygv1787937514985","price":259.86,"currency_code":"USD","in_stock":true},{"title":"36mm","offer_id":52184003576037,"sku":"gcb1787937514986","price":310.0,"currency_code":"USD","in_stock":true},{"title":"50mm","offer_id":52184003608805,"sku":"szv1787937514987","price":474.1,"currency_code":"USD","in_stock":true},{"title":"M52","offer_id":52184003641573,"sku":"osm1787937514988","price":481.28,"currency_code":"USD","in_stock":true},{"title":"50 x 50mm²","offer_id":52184003674341,"sku":"ues1787937514989","price":454.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/4561\/8405\/files\/astronomik-h-alpha-6nm-ccd-maxfr-filter_1.jpg?v=1787937519","url":"https:\/\/perovia.shop\/products\/astronomik-h-alpha-6nm-ccd-maxfr-filter","provider":"My Store","version":"1.0","type":"link"}