{"product_id":"skywatcher-1-25-inch-ultra-high-contrast-uhc-filter-20195","title":"Sky-Watcher 1.25 Inch Ultra High Contrast UHC Filter 20195","description":"\u003ch2\u003eSky-Watcher 1.25\" Ultra High Contrast (UHC) Filter — 20195\u003c\/h2\u003e\n\u003cp\u003eThe Sky-Watcher 1.25\" Ultra High Contrast (UHC) Filter is a powerful narrowband filter designed to improve visibility of faint nebulae while reducing the effects of light pollution. Threaded to fit standard \u003cstrong\u003e1.25\" eyepieces\u003c\/strong\u003e, it’s an excellent dark-sky companion for observers using small to medium aperture telescopes.\u003c\/p\u003e\n\u003ch3\u003eReveal more structure in nebulae\u003c\/h3\u003e\n\u003cp\u003eBy selectively transmitting key emission wavelengths and blocking much of the surrounding skyglow, the UHC filter enhances contrast and helps reveal delicate details that are otherwise difficult to see — especially from suburban observing sites.\u003c\/p\u003e\n\u003cp\u003eIt performs particularly well on targets such as:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eOrion Nebula (M42)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLagoon Nebula (M8)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eSwan \/ Omega Nebula (M17)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eMany other emission and planetary nebulae\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBecause it allows more light through than an O-III filter, the UHC is especially effective on \u003cstrong\u003esmaller telescopes\u003c\/strong\u003e, maintaining image brightness while still suppressing light pollution.\u003c\/p\u003e\n\u003ch3\u003eNarrowband optical design\u003c\/h3\u003e\n\u003cp\u003eThis UHC filter isolates:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eOxygen-III (O-III) lines\u003c\/strong\u003e at 496 \u0026amp; 501nm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eHydrogen-Beta (H-β) line\u003c\/strong\u003e at 486nm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe result is improved contrast, darker backgrounds and more visible structure in extended nebulae.\u003c\/p\u003e\n\u003cp\u003eSupplied in a protective storage case, the Sky-Watcher 1.25\" Ultra High Contrast Filter (20195) is an excellent all-round nebula filter — ideal for boosting deep-sky views in less-than-perfect skies.\u003c\/p\u003e","brand":"SkyWatcher","offers":[{"title":"Default Title","offer_id":57010352390518,"sku":"5055534800287","price":49.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0909\/2235\/3014\/files\/download_c0584c0e-9801-4aee-967f-8f2e4fe62e33.jpg?v=1767793745","url":"https:\/\/welshastronomy.co.uk\/products\/skywatcher-1-25-inch-ultra-high-contrast-uhc-filter-20195","provider":"The Welsh Astronomy Centre","version":"1.0","type":"link"}