Open Box Astronomik 1.25" 6nm Narrowband Filter Set

ITEM #
UT-11825
  • Sale
  • $419.00
  • Regular price $599.00
  • Open Box Astronomik 1.25" 6nm Narrowband Filter Set

    • Sale
    • $419.00
    • Regular price $599.00
    • ITEM #
      UT-11825

    0
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    Open Box Astronomik 1.25" 6nm Narrowband Filter Set

    Astronomik MFR Narrowband Emission Line Filter Highlights:
    • Special Coatings Allow Filter Use Across Most Focal Ratios: Astronomik Narrowband Emission line filters have been designed to be used with a wide range of focal ratios. The special MFR (multi-focal ratio) coatings applied to the 12 nm FWHM filters make them compatible with optics as fast as f/3, and the 6 nm models perform well with focal ratios as fast as f/4. This means you won't need to buy different filters for your fast refractor and your SCT, and you won't have to pay premium prices for high-speed filters.

     

    • Amazingly High Out of Band Blocking: Astronomik Narrowband Emission-line Filters offer superb blocking of unwanted wavelengths, from UV up to IR. Transmission of 90-percent is guaranteed by Astronomik, but the typical transmission can be as high as 96-percent on both 6 nm and 12 nm Narrowband filters. This feature translates to extremely high contrast and pleasingly dark background skies, even under heavily light-polluted conditions, allowing you to take longer exposures if you so desire without creating an overly bright (or saturated) background. Another benefit of good out-of-band blocking is the reduction of stray light and halos. Stars display as sharp points of light on a velvety black background, providing the perfect backdrop for the deep-sky object you are imaging.

     

    • Image During Full Moon or Under Light Polluted Skies: Because Astronomik Narrowband Emission Line Filters have a high transmission rate for the chosen wavelength but blocks pretty much everything else, you can image from your own backyard, even if your neighborhood suffers from light-pollution (which is pretty much everybody). If it is a beautiful night with great seeing but the Moon phase does not support visual deep-sky astronomy, you can pull out your telescope, camera, and Astronomik filters and still get great results.

    Additional Information

    Accessory TypeFilter Set
    ConditionExcellent
    Filter TypeNarrowband
    ManufacturerAstronomik
    Warranty90 Day Covered By OPT

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