{"product_id":"astronomik-uhc-e-clip-filter-eos-aps-c-ideal-for-small-scopes","title":"Astronomik UHC-E Clip-Filter EOS APS-C – Ideal for Small Scopes","description":"\u003ch1\u003eAstronomik UHC-E Clip-Filter EOS APS-C – Perfect for Deep-Sky \u0026amp; Comets\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eThe Astronomik UHC-E Clip-Filter is a cost-effective option for deep-sky and comet observations under light-polluted skies, ideal for smaller telescopes.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe UHC-E filter boosts contrast for emission nebulae and comets while blocking streetlight pollution and airglow, making it highly effective for telescopes up to 5\" (125mm) in aperture.\u003c\/p\u003e\n\u003ch4\u003eMain Use\u003c\/h4\u003e\n\u003cp\u003eThis filter offers a full width at half maximum (FWHM) of 45nm, effectively blocking sodium and mercury vapor streetlights and enhancing the contrast between celestial objects and the night sky. While the contrast is slightly less compared to the Astronomik UHC filter, the UHC-E allows for more starlight, making it better suited for smaller telescopes. The filter also passes a carbon spectral line, allowing comet observation.\u003c\/p\u003e\n\u003ch4\u003eOther Uses\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eObservation of Jupiter’s clouds\u003c\/li\u003e\n\u003cli\u003eEasier resolution of double stars\u003c\/li\u003e\n\u003cli\u003eDSLR and camera photography under light-polluted skies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAlternatives\u003c\/h4\u003e\n\u003cp\u003eIf you use a telescope larger than 5\", the Astronomik UHC filter offers greater contrast. For telescopes over 8\", the OIII filter provides even better results when observing certain nebulae.\u003c\/p\u003e\n\u003ch4\u003eSuitability\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Reasonable, UHC filter is better\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Good, suitable for telescopes up to 125mm\u003c\/li\u003e\n\u003cli\u003eFilm photography: Good, but requires long exposure times\u003c\/li\u003e\n\u003cli\u003eCCD photography: Good with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Excellent color balance\u003c\/li\u003e\n\u003cli\u003eWebcam\/Video (Deep Sky): Very good for light-polluted areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Data\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e94% transmission at 486nm (H-beta)\u003c\/li\u003e\n\u003cli\u003e95% transmission at 496nm and 501nm (OIII)\u003c\/li\u003e\n\u003cli\u003e94% transmission at 656nm (H-alpha)\u003c\/li\u003e\n\u003cli\u003eTransmission range: 465nm–530nm and above 645nm\u003c\/li\u003e\n\u003cli\u003eFull width at half maximum: 45nm\u003c\/li\u003e\n\u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eHighly resistant to humidity, scratches, and aging\u003c\/li\u003e\n\u003cli\u003eDiffraction-limited: Does not reduce the optical performance of your telescope\u003c\/li\u003e\n\u003cli\u003eComes in a high-quality, durable filter box\u003c\/li\u003e\n\u003cli\u003eNew design since 2008 to eliminate halos and reflections\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Astronomik","offers":[{"title":"Default Title","offer_id":42055475396785,"sku":"","price":98.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0523\/1650\/4241\/files\/astronomik-uhc-e-clip-filter-eos-aps-c-360553.jpg?v=1782295518","url":"https:\/\/www.darkclearskies.co.uk\/products\/astronomik-uhc-e-clip-filter-eos-aps-c-ideal-for-small-scopes","provider":"Dark Clear Skies ","version":"1.0","type":"link"}