Baader Planetarium 2" Orange Eyepiece Filter - 570 nm Longpass - FCFO-2

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  • $79.00

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  • This 2" Orange Filter from Baader delivers maximum brightness, while reflections, ghosting, and stray light are eliminated
  • Fine optical plane parallel polished to within 30 arcseconds
  • Comparable to the Wratten #21 in color, this high quality Baader filter is a longpass filter with a high 570nm transmission
  • Features professional 7-layer multi-coatings for a resulting image that doesn't have false reflections
  • Stackable 2" filter cell with male as well as female threads to enable you to combine filters to suit your needs
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  • Description

    Baader 2" Orange 570 nm Longpass Eyepiece Filter 

    Freedom from Ghost images, even when stacked. Striae-free substrates are polished parallel to 30 seconds of to avoid wedge errors. Finest 7-layer hard multi-coatings on both faces feature 0.25% residual reflections (Baader filters are unique, no other colored filter incorporates anti-reflection multi-coatings). The coatings are also different for each of the filters, in order to match the coating performance to the filter curve of each color. This maximizes the transmission and minimizes reflections.

    Extremely High Transmissions deliver maximum contrast to highlight planetary details, even when smaller telescopes are being employed. The three Baader longpass filters (Red, Orange, and Yellow) have peak efficiencies of 98%, while the three Baader bandpass filters (Green, Blue, and Dark Blue) top out at 70%.

    Carefully designed spectral characteristics. In order to deliver even narrower passbands, these color filters from Baader can be stacked without ghosting or image degradation. Additionally, they can combine with other Baader filters to enable many interesting contingencies.

    No reduction in sharpness, even at high magnifications or when using the filter far ahead of the focal plane (ie, digital imaging, or in front of a diagonal or binoviewer).



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    Shipping Restrictions

    Only ships in contiguous USA.

  • Dimensions & Specifications

    • Filter Size: 2"
    • Filter Type: Planetary Color
    • Filter Shape: Round
    • Mounted/Unmounted: Mounted
    • Wratten Number or Equivalent: #21 Orange

  • Product Guarantee

    We stand behind all the products we sell, and your satisfaction is our top priority. If you're not satisfied with the quality of your purchase, simply send the item back to us in its original packaging within 30 days of its delivery.

    Manufacturer Warranty

    This product has a 2 year manufacturer's warranty against defects is provided. If you have specific questions about this product's warranty please contact Alpine Astronomical's Customer Service department by email at service@alpineastro.com.

    Return & Exchange Policy

    At our site, returns are easy! You may return new, unused, and resalable items for a refund or exchange. Simply ensure that the item is returned in its original product packaging within 30 days of delivery.

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