{"product_id":"explore-scientific-dark-sky-filter-77mm-slim","title":"Dark-Sky Filter 77mm Slim","description":"\u003c!--start tab--\u003e\u003c!--end tab--\u003e\u003c!--start tab--\u003e\n\u003cp\u003eUniversally applicable dark sky filter with 77mm filter thread for photo lenses. Particularly suitable for increasing contrast in aurora and deep-sky photography.\u003c\/p\u003e\n\u003cp\u003eThe wavelengths of 550nm (green) and 630nm (red), which are particularly relevant for aurora photography, are transmitted to more than 90%. A special feature of other so-called CLS filters is that only the yellow light of the sodium line is effectively blocked at 590nmwill. This effectively suppresses sodium vapor lamps from street lighting and greenhouses (assimilation light). This is a clear advantage because the yellow light for the digital camera is always registered as a mixture of red and green. Especially with aurora photography or recordings of emission nebulae, later removal of the light pollution by post-processing the photos would be virtually impossible.\u003c\/p\u003e\n\u003cp\u003eA reduction in yellow tones also ensures a better differentiation between red and green tones.\u003c\/p\u003e\n\u003cp\u003eWith the Explore Scientific Dark-Sky Filter, weaker aurora events from cities can also be detected photographically.\u003c\/p\u003e\n\u003cp\u003eEspecially in times of increasing light pollution, this filter does an extremely good job. In contrast to widely used interference filters (CLS, UHC), this filter can also be used without restriction in front of a wide-angle lens, which is not possible with interference filters. Such filters require perpendicularly incident light and have to be installed between the lens and the camera in a complex manner for wide-angle recordings.\u003c\/p\u003e\n\u003cp\u003eThe dark sky filter is not only of value for the ambitious astrophotographer, it also ensures natural color reproduction of the night sky without complex image processing .\u003c\/p\u003e\n\u003cp\u003eIn nature and macro photography red and brown tones (e.g. twilight colors, sunset, autumn leaves) are emphasized and better differentiated.\u003c\/p\u003e\n\u003cp\u003eDue to the very flat design (slim) of only 4mm, this filter is also fully suitable for wide-angle lenses. This means that vignetting-free recordings are possible.\u003c\/p\u003e\n\u003cp\u003eTest images taken by Bernd Pröschold - www.sternstunden.net\u003c\/p\u003e\n\u003cp\u003eComparison test at: http:\/\/www.sternstunden.net\/filter-testing.html\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDark-Sky filter\u003c\/li\u003e\n\u003cli\u003eContrast increase in aurora \u0026amp; deep-sky photography\u003c\/li\u003e\n\u003cli\u003eReduction of stray light from street lights, for example\u003c\/li\u003e\n\u003cli\u003eWide-angle shots of the starry sky, time-lapse shots\u003c\/li\u003e\n\u003cli\u003eBlocks yellow light, not possible with image editing\u003c\/li\u003e\n\u003cli\u003eBlack anodized aluminum housing\u003c\/li\u003e\n\u003cli\u003e77mm filter thread for photo lenses\u003c\/li\u003e\n\u003cli\u003eConstruction height only 4mm (Slim)\u003c\/li\u003e\n\u003cli\u003eSuitable for wide-angle lenses\u003c\/li\u003e\n\u003cli\u003eMade of special optical glass with neodymium oxide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!--end tab--\u003e","brand":"Explore Scientific","offers":[{"title":"Default Title","offer_id":45643724554481,"sku":"310260","price":149.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/5711\/6312\/files\/310260_1.jpg?v=1736428600","url":"https:\/\/villohome.com\/products\/explore-scientific-dark-sky-filter-77mm-slim","provider":"Villohome","version":"1.0","type":"link"}