Baader Planetarium 1.25" Yellow Eyepiece Filter - 495 nm Longpass - FCFY-1

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  • This 1.25" Yellow Filter from Baader delivers maximum brightness, while reflections, ghosting, and stray light are eliminated
  • Fine-optically plane parallel polished to within 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.
  • Skillfully coated with 7 layers of multi-coatings for an image with no false reflections
  • 1.25" filter cell with both male and female threads is stackable to allow you to combine filters as you wish
Questions? Let our experts help!
  • Description

    Baader Planetarium 495 nm Bandpass Yellow Eyepiece Filter - 1.25"

    Freedom from Ghost images, even when stacked. To avoid wedge errors, striae-free substrates are polished parallel to 30 seconds. First-class 7-layer hard multi-coatings on each face have 0.25% residual reflections. Baader filters are unique in this way as no other colored filter includes anti-reflection multicoatings. In addition, these coatings differ depending on the filter so that the coating performance matches the filter curve of each color. This increases 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. Filters may be stacked without image degradation or ghosting, in order to provide even narrower passbands. Or, combine with any of the other Baader filters for interesting possibilities.

    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.

    What's Included

    • Baader Planetarium Yellow 495 nm Longpass Filter in 1.25" Cell

  • Dimensions & Specifications

    • Filter Size: 1.25"
    • 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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