{"product_id":"altair-2nm-g-band-solar-contrast-filter-2-430-3nm-copy","title":"Altair 2nm G-Band Solar Contrast Filter - 1.25\" 430.3nm","description":"\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eIMPORTANT SAFETY INFORMATION: DO NOT USE THIS FILTER FOR DIRECT SOLAR OBSERVATION! Must be used together with a professional solar filter film or glass type, or Hershel Wedge with Max. 0.024% transmission placed BEFORE this filter. For reflecting telescopes, we recommend installing a solar film filter on the front of the telescope, then screwing the filter into a filter holder, camera, or eyepiece. For refractors, the G-Band filter should be positioned just in front of the camera or eyepiece with a Hershel Wedge in place ahead of it. Do not use this filter without a suitable solar pre-filter in place, because it will permanently damage your eyes or camera! \u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan color=\"#ff0000\" style=\"color: #ff0000;\"\u003eDo not insert the filter before your Hershel Prism or it will melt, it should be placed just in front of the camera, AFTER THE HERSCHEL PRISM. For a Hypercam you can\u003c\/span\u003e\u003cspan color=\"#ff0000\" style=\"color: #ff0000;\"\u003e use an Altair Magnetic Filter holder with 2\" filter slider\u003c\/span\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAltair 2nm G-Band Solar Contrast Filter - 2\" 430.3nm: Enhancing Solar Imaging\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInnovative Solar Astronomy Tool\u003c\/strong\u003e: The Altair G-Band 2nm Solar Filter is a pioneering accessory for solar astronomy, specifically designed to accentuate finer details in the solar photosphere.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Contrast and Detail\u003c\/strong\u003e: This filter significantly boosts contrast, making features such as faculae, sunspots, umbral and penumbral areas more distinct. It also amplifies the visibility of granulation in the photosphere.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRevealing Unique Solar Features\u003c\/strong\u003e: Ideal for advanced solar imagers, the G-Band filter can potentially expose \"bright spots\" between solar convection cells, especially when used with reflectors of 250mm aperture or larger.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility and Usage\u003c\/strong\u003e: Perfect for all-mirror, open-tube designs like Newtonian telescopes and Classical Cassegrains. Essential to pair with Baader \"imaging\" ND3.8 solar film for optimal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Compliance\u003c\/strong\u003e: Must be used in conjunction with a professional solar filter, such as Baader Solar Film Filters or a Herschel Wedge. Ensures the safety of both the user and equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh Transmission and Blocking\u003c\/strong\u003e: Blocks UV, IR, and visual wavelengths, transmitting only a 2nm FWHM blue band at 430.3nm, resulting in high contrast solar features. Approximately 96% transmission ensures clarity and detail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended Camera Pairing\u003c\/strong\u003e: Best used with a monochrome camera, like the Altair Hypercam 174M or Altair GPCAM3 287M Mono USB3 Camera, for superior imaging results.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation Guidance\u003c\/strong\u003e: Careful installation is advised. For refracting telescopes, position the filter before the camera or eyepiece, following a Herschel Wedge.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuality Assurance\u003c\/strong\u003e: Each filter comes with a unique high-resolution spectrographic analysis, specific to its serial number.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Specifications\u003c\/strong\u003e: Features a standard 2\" threaded aluminium cell, CWL of 430.3nm at 96% transmission, FWHM of 2nm, and OD of 6.5. The filter is 1.85mm thick with quartz λ\/4, parallelism of 30 arcsec, and Si02 hard overcoat with UVIR Block.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDisclaimer\u003c\/strong\u003e:Always prioritize safety by using this filter in conjunction with appropriate solar pre-filters.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch1\u003eSpecifications\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eStandard 2\" Filter Threaded Aluminium Cell\u003c\/li\u003e\n\u003cli\u003eCWL 430.3nm @ 96% transmission, tolerance 1%\u003c\/li\u003e\n\u003cli\u003eFWHM 2nm, tolerance 0.5nm.\u003c\/li\u003e\n\u003cli\u003eOD 6.5 Average blocking over 200-1100nm range. IR Blocked to 1100nm.\u003c\/li\u003e\n\u003cli\u003e1.85mm thick quartz λ\/4, Parallelism (arcsec) 30\"\u003c\/li\u003e\n\u003cli\u003eSi02 \"hard\" overcoat with UVIR Block 300-1100nm and Anti-Reflection Coating\u003c\/li\u003e\n\u003cli\u003eHigh resolution spectrographic test report included corresponding to each individual filter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"Altair Astro","offers":[{"title":"Default Title","offer_id":52015465464128,"sku":"F125GB43032","price":219.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/9904\/6464\/files\/altair-2nm-g-band-solar-contrast-filter-1.25-430.3nm-13245-p.jpg?v=1778930841","url":"https:\/\/astroworldtelescopes.com\/products\/altair-2nm-g-band-solar-contrast-filter-2-430-3nm-copy","provider":"Astroworld Telescopes","version":"1.0","type":"link"}