Baader Planetarium Fringe-Killer Filter, 2" Eyepiece

SKU: AA2458375 MFR: FFK-2
$155.00
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Key Features

  • Enhance planetary detail with this 2" Baader Planetarium Fringe-Killer filter.
  • Reduce unwanted light pollution for clearer, crisper astronomical viewing.
  • The 50.8mm filter thread size fits standard 2" telescope eyepieces easily.
  • Experience superior filter quality from Baader Planetarium, a trusted brand.
  • Ideal for deep-sky viewing, revealing faint nebulae and galaxies with clarity.
  • Minimize chromatic aberration with this Fringe-Killer, improving image quality.
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Special Order?Estimated to Ship: 08/15/2025
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Shopper : What is it used for?
Shopper : Why Did You Choose This?Craig A : Good reviews for stated use.WILLIAM R : Baader are quality products, I have the contrast booster and semi-apo filter for my AR 127 achro and love the filters, wouldn’t buy anything else.PHILIP S : The BAADER Planetarium company has the experience, competence and reputation, as the finest producer of astronomic filters for commercial, professional, or amateur astronomers and photographers.MONROE P : unfocused blue reduction

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Baader Planetarium FFK-2 Specifications

  • Eyepiece

    2" / 50.8mm

  • UPC Code

    4047825009487

About Baader Planetarium FFK-2

Are you seeking to elevate your astrophotography and observational experiences with a small refractor telescope Look no further than the Baader Planetarium FFK-2 Fringe-Killer Filter, a 2" eyepiece filter designed to enhance your view of the cosmos. This exceptional filter stands out as the brightest among color-correcting filters available in the market, ensuring that you capture the most vivid and true-to-life images.

The Baader Fringe-Killer Filter expertly minimizes undesirable blue fringing, often compared to the performance of a Minus-Violet-Filter, while maintaining an aesthetically pleasing color balance. This remarkable achievement in color correction is made possible through the use of advanced DWDM plasma-assisted coating technology. This cutting-edge process allows for the application of nearly a hundred ultra-thin coating layers on a planoptically polished substrate, preserving the optical figure and ensuring the highest quality of light transmission.

By utilizing this fine optical instrument, your small refractor can reach its full potential, achieving the magnification promised right out of the box. The filter's performance is on par with the most luxurious color correcting lens systems, which can cost up to 20 times more, making it an economical choice for serious astronomers and astrophotographers.

The intricate coatings that enable this innovative filtration are incredibly complex, involving almost 50 layers per side. These layers are meticulously applied using the latest in DWDM Plasma assisted coating processes, resulting in what may be the most sophisticated coating ever applied to an amateur astronomical filter.

The Fringe Killer is the ideal complement to the Baader Contrast Booster, an aggressive filter crafted to extract the maximum sharpness and contrast from an achromat. When paired, these filters effectively eliminate violet haze, producing a slightly dimmer and warmer image while enhancing color contrasts through additional RGB filtration.

Digital imagers, including those using CCD, digital cameras, and webcams, will discover that the Fringe Killer is the perfect match for their achromatic refractors. Its high light transmission and fringe reduction capabilities are superb for capturing both planetary detail and the depths of deep-sky objects.

In addition to its color-correcting prowess, the Fringe Killer includes Baader's renowned UV/IR Cut coatings. These coatings are integral to the filter's formula, offering sharp cutoffs in the infrared and ultraviolet spectrums while maintaining exceptionally high transmission rates. This ensures that your images are clear, sharp, and free from the distortions that can be caused by these unwanted wavelengths.

Enhance your celestial viewing and imaging with the Baader Planetarium FFK-2 Fringe-Killer Filter, a 2" eyepiece filter that promises to revolutionize the way you observe and capture the night sky.

Baader Planetarium FFK-2 Features

  • Built-in Infrared Blocker (656 nm to 1150 nm) - great for CCD work or projection photography of the Moon and planets with digital cameras
  • The Baader Planetarium Fringe-Killer Filter is fully threaded and designed for 2" oculars
  • The Baader Planetarium Fringe-Killer Filter removes unwanted blue and purple image fringing while still retaining a pleasing color balance
  • Plasma-assisted coating technology allows application of 50 coating layers on the glass without destroying the optical figure
  • Offering the brightest image of all color-correcting devices in the industry, makes the Fringe-Killer a must for even the smallest of refracting (lens type) telescopes
  • Removes blue fringing as well as RED fringing above 656 nm
  • Forms a "plateau" of eff. 50% transmission in the blue spectral region from 450 nm to 480 nm, which is much more complex to produce than even the narrowest of all Nebula Filters
  • Retains the highest light transmission of all known color correcting devices - be it filters or lenses - in all important deep sky wavelengths from 486/501 up to 656 nm
  • Built-in Infrared Blocker, ranging from 656 to 1150 nm, makes it the perfect tool for CCD work, as well as afocal projection photography with digital cameras for the Moon and planets
  • The most subtle of color variations remain visible in planetary surface detail, due to the excellent color balance
  • Combine with the Baader Red 610 nm color filter to receive an ultra narrow (-70 nm) wide H-Alpha passband filter at an amazing 95% peak transmission
  • Combine with the 2" Skyglow Filter for breathtaking contrast on lunar and planetary surface detail
  • Planoptically polished to achieve perfect sharpness, even when mounted way in front of a binocular viewer, or during afocal projection (digital imaging)
  • No deterioration of resolution with magnification at 300 times or more, something that would not happen with the usual "flame polished" (raw polished) glass, commonly used for a wide variety of filters
  • Plasma-assisted, hardest, scratch proof and water impermeable dielectric coatings of almost 50 coating layers on either side, most carefully designed to extend equal tension onto either side of the substrate in order to retain the highest quality optical figure

Warranty Information

This product has a limited warranty of 24 months for parts and 24 months for labor.

Key Features

  • Enhance planetary detail with this 2" Baader Planetarium Fringe-Killer filter.
  • Reduce unwanted light pollution for clearer, crisper astronomical viewing.
  • The 50.8mm filter thread size fits standard 2" telescope eyepieces easily.
  • Experience superior filter quality from Baader Planetarium, a trusted brand.
  • Ideal for deep-sky viewing, revealing faint nebulae and galaxies with clarity.
  • Minimize chromatic aberration with this Fringe-Killer, improving image quality.