Baader Planetarium 2" Yellow Eyepiece Filter - 495 nm Longpass - FCFY-2

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Item #BAAD-FCFY-2

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  • $64.00

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  • Eliminates reflections, ghosting, and stray light, while delivering peak brightness
  • Fine optical plane parallel polishing inside 30 arcseconds
  • Comparable to the Wratten #12 filter in terms of color, this supreme quality Baader longpass filter has a high transmission at 495nm, making it an excellent choice for getting rid of chromatic aberraton from achromatic refractors.
  • This Baader 2" Yellow Filter contains professional 7-layer multicoatings for an image free of false reflections
  • 2" filter cell with both male and female threads is stackable to allow you to combine filters as you wish
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  • Description

    Baader 495 nm Longpass Filter - 2" Yellow

    Freedom from Ghost images, even when stacked. The substrates of this Baader 2" filter are free of striae and polished parallel to 30 seconds in order to avoid wedge errors. It features the finest hard 7-layer multi-coatings on each face with 0.25% residual reflections. Baader filters are special in this regard as all competing filters are without anti-reflection multi-coatings. Futhermore, the coatings differ for each filter so that they match the coating performance to each color's filter curve to increase transmission while decreasing reflections.

    Extremely High Transmissions provide maximum contrast to bring out planetary details, even when smaller telescopes are used. 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). 

    Supplier SKU

    FCFY-2

    Shipping Restrictions

    Only ships in contiguous USA.

    What's Included

    • Baader Planetarium 495 nm Longpass Yellow Eyepiece Filter - 2"

  • Dimensions & Specifications

    • Filter Size: 2"
    • Filter Type: Planetary Color
    • Filter Shape: Round
    • Mounted/Unmounted: Mounted
    • Wratten Number or Equivalent: #12 Yellow


  • 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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