{"product_id":"astronomik-h-beta-filter","title":"Astronomik H-Beta Filter","description":"\u003ch2\u003eAstronomik H-Beta Filter\u003c\/h2\u003e\nThe Astronomik H-beta is a filter for visual observation, in particular with instruments of larger aperture. It lets the light of the H-beta emission line pass nearly unhindered and blocks the remaining spectral range to the extent that the eye is dark adapted. By the use of the Astronomik H-beta filter, the contrast is increased so strongly, that even the observation of the Horse Head Nebulae with telescopes of 10\" - 12\" reaches the realm of the possible.\n\u003ch4\u003e\u003cstrong\u003eMain use\u003c\/strong\u003e\u003c\/h4\u003e\nThe optimal aperture ratio for the use of the filter is 1:4,5 to 1:6. The range of application extends from 1:3.5 to 1:15. Transmission losses and chromatic distortions, which arise with other filters, are only apparent with the Astronomik filters when extremely fast aperture ratios of 1:3 and higher are used. The Astronomik H-beta filter will allow you to view large objects, in the whole field of view of the eyepiece, even when using wide-angle eyepieces - not only in the center of the eyepiece. This filter should be used on telescopes with a diameter of 8 \" (20cm) or larger. Smaller instruments do not gather enough light for meaningful and satisfying astronomical work. Due to the high optical quality of the Astronomik H-beta filter substrate you will see the same needle-sharp stars as you would from your regular telescope.\n\u003ch4\u003e\u003cstrong\u003eOther uses\u003c\/strong\u003e\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eIn the whole sky, there are few objects that benefit from the use of this filter in visual observation. On the other hand h-beta filters often decide about seeing or not seeing an object. Without a filter the eye is hardly able to discover the low contrasts of H-alpha regions.\u003c\/li\u003e\n\u003cli\u003eWith EOS Clip Filter even in extreme light polluted areas photography with DSLR cameras becomes possible.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cbr\u003e","brand":"Astronomik","offers":[{"title":"1.25\"","offer_id":51750860914921,"sku":"ttc1787937133981","price":68.29,"currency_code":"USD","in_stock":true},{"title":"2\"","offer_id":51750860947689,"sku":"jbo1787937133982","price":131.21,"currency_code":"USD","in_stock":true},{"title":"SC Rear Cell","offer_id":51750860980457,"sku":"lwt1787937133983","price":166.85,"currency_code":"USD","in_stock":true},{"title":"T-Mount - M42 x 0.75","offer_id":51750861013225,"sku":"yqg1787937133984","price":133.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0766\/6964\/9129\/files\/astronomik-h-beta-filter_1.webp?v=1787937137","url":"https:\/\/www.sandalcove.shop\/products\/astronomik-h-beta-filter","provider":"My Store","version":"1.0","type":"link"}