{"product_id":"player-one-oiii-7nm-narrowband-filter-s-series","title":"Player One OIII 7nm Narrowband Filter S-series","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOxygen-III (OIII) 7nm Narrowband Filter\u003c\/li\u003e\n\u003cli\u003eAvailable in 1.25\" and 2\" Sizes for Narrowband Astrophotography\u003c\/li\u003e\n\u003cli\u003eHigh-Transmission, Multi-Layer Coatings\u003c\/li\u003e\n\u003cli\u003eHigh-Quality Optical Glass Substrate\u003c\/li\u003e\n\u003cli\u003eExcellent Halo Suppression and Sharp Cutoffs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003ePlayer One OIII 7nm Narrowband Filter S-series\u003c\/h2\u003e\n      \u003cp\u003eThe Player One S-series OIII filter isolates the Oxygen-III emission line, one of the three essential filters—alongside Hydrogen-alpha and Sulfur-II—for advanced narrowband astrophotography. Available in 1.25\" and 2\" sizes with a 7nm bandpass, it is built on a high-quality optical glass substrate with multi-layer coatings to isolate this key emission line from nebulae with excellent transmission and sharp cutoffs.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eThe S-Series Line: Capturing 3 Core Nebulae Emission Lines\u003c\/h3\u003e\n      \u003cp\u003eNarrowband filters form the foundation of modern deep-sky imaging, especially from light-polluted locations. This OIII filter isolates one of the three primary emission lines found in most nebulae, so you can capture pristine, high-contrast data of your target while rejecting unwanted city glow, moonlight, and airglow. The three lines, with Ha and SII filters sold separately:\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha (Ha):\u003c\/strong\u003e Captures the most dominant wavelength in emission nebulae, revealing intricate structural details in objects like the North American Nebula (NGC 7000).\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eSulfur-II (SII):\u003c\/strong\u003e Isolates ionized sulfur, often found in the shock fronts and deeper, dense regions of nebulae, adding texture and a deep red color in false-color composites.\u003c\/li\u003e\n          \u003cli\u003e\n\u003cstrong\u003eOxygen-III (OIII, this filter):\u003c\/strong\u003e Gathers light from doubly ionized oxygen, which traces the hottest, highest-energy areas of a nebula, typically appearing as blue or green in finished images.\u003c\/li\u003e\n        \u003c\/ul\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eAdvanced Coatings for Superior Halo Control and Transmission\u003c\/h3\u003e\n      \u003cp\u003ePlayer One constructs the S-series filters using a high-quality optical glass substrate, ensuring a stable and parfocal platform. The surfaces receive a multi-layer composite coating engineered for astrophotography, which delivers sharp cutoff rates to cleanly separate the target wavelength from adjacent light pollution lines. The 2\" format provides a clear aperture suitable for larger imaging sensors, preventing vignetting on full-frame cameras or when used with fast optical systems.\u003c\/p\u003e\n      \u003cp\u003eThis coating technology also provides excellent halo control around bright stars. This prevents distracting rings and artifacts that can otherwise overwhelm the faint nebulosity in your image, resulting in cleaner data and a more natural-looking final result with stars that remain tight and well-defined.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eCreating a Hubble Palette Image with Ha, SII, and OIII\u003c\/h3\u003e\n      \u003cp\u003eThe primary application for this filter, together with Ha and SII filters, is creating false-color images in the \"Hubble Palette,\" or SHO mapping. By assigning the data from the SII filter to the red channel, Ha to the green, and OIII to the blue, you can produce vibrant, scientifically informative images that reveal the underlying chemical composition of a nebula.\u003c\/p\u003e\n      \u003cp\u003eThis technique is not only aesthetically striking but also a powerful tool for separating structures within complex targets like the Heart Nebula (IC 1805) or the Eagle Nebula (M16). The Player One S-series OIII filter and its Ha and SII counterparts give you the necessary tools to begin exploring this advanced processing technique with your monochrome astronomy camera.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of using the Player One S-series OIII filter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe main advantage is its ability to dramatically increase contrast and detail in images of emission nebulae by isolating the Oxygen-III wavelength. This makes the Player One S-series OIII filter highly effective at combating light pollution, allowing you to capture high-quality deep-sky images even from urban or suburban locations.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the S-series OIII filter to image the Pelican Nebula (IC 5070)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eTo image the Pelican Nebula with a monochrome camera, you would capture separate long-exposure images with the OIII filter and the matching \u003cstrong\u003eHa and SII filters\u003c\/strong\u003e. Later, in processing software, you can combine these three black-and-white images into a single color photo, often using the Hubble Palette (SHO) to assign SII to red, Ha to green, and OIII to blue for a vibrant, detailed result.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of results can I expect with the S-series OIII filter on the Rosette Nebula (NGC 2244) using a monochrome camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eOn the Rosette Nebula, the \u003cstrong\u003eOIII filter\u003c\/strong\u003e will highlight the hot, central region around the star cluster. Combined with \u003cstrong\u003eHa filter\u003c\/strong\u003e data revealing the vast, sweeping structures of the hydrogen gas and \u003cstrong\u003eSII filter\u003c\/strong\u003e data picking out finer, wispy details at the outer edges, it will create a rich, multi-layered image that a broadband filter could not achieve.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Player One S-series OIII filter with a color camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile narrowband filters like the Player One S-series are designed for \u003cstrong\u003emonochrome cameras\u003c\/strong\u003e for maximum efficiency, they can be used with a one-shot-color (OSC) camera. However, because the camera's color filter array will block much of the light, exposure times will need to be significantly longer, and the resulting signal will be weaker than with a dedicated mono camera.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eThe product description for the S-series OIII filter mentions halo control. Why is this important?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eExcellent halo control is critical for narrowband imaging because you are often taking very long exposures of star fields. Poor coatings can cause bright stars to produce distracting rings or \"halos\" of reflected light. The advanced coatings on the Player One S-series filters suppress these artifacts, ensuring that bright stars in fields like the Sadr Region remain sharp points of light without overwhelming the faint surrounding nebulosity.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Player One S-series OIII filter help with light pollution?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Player One S-series OIII filter helps by being extremely selective about which light it allows to pass through to the sensor. It is designed to transmit only the specific wavelength of light emitted by doubly ionized oxygen in nebulae while blocking most other sources, including the broad-spectrum glow from artificial city lights. This isolates the \"signal\" from the nebula from the \"noise\" of light pollution.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ch3\u003e1.25\"\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband Emission Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmission Line\u003c\/td\u003e\n\u003ctd\u003eOxygen-III (OIII)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e1.25\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eS-series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eHigh-quality optical glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eMulti-layer composite coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e2\"\u003c\/h3\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Type\u003c\/td\u003e\n\u003ctd\u003eNarrowband Emission Line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmission Line\u003c\/td\u003e\n\u003ctd\u003eOxygen-III (OIII)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003ctd\u003e7nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize\u003c\/td\u003e\n\u003ctd\u003e2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries\u003c\/td\u003e\n\u003ctd\u003eS-series\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSubstrate\u003c\/td\u003e\n\u003ctd\u003eHigh-quality optical glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eMulti-layer composite coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cul class=\"DAV-grid\"\u003e\n  \u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Player_One_2026_Product_Catalog_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003e\u003ca title=\"Player One 2-Year Warranty\" href=\"https:\/\/davidastro.com\/pages\/player-one-warranty-policy\" target=\"_blank\"\u003ePlayer One 2-Year Warranty\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Player One","offers":[{"title":"1.25\"","offer_id":52913427317021,"sku":"POA-OIII7-125","price":181.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":52913427349789,"sku":"POA-OIII7-2","price":349.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/PlayerOne-Ha-SII-OIII-7nm-narrowband-1-25-Filter-S-series-1-OIII7-125_ec64446a-413d-4654-ab96-7d4d2aafff45.jpg?v=1789090952","url":"https:\/\/davidastro.com\/products\/player-one-oiii-7nm-narrowband-filter-s-series","provider":"David Astro","version":"1.0","type":"link"}