Baader Fringe Killer Filter

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Baader Fringe Killer Filter

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€ 65.00 Price excl. German VAT tax (19%): € 54.62

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  • The fringe killer blocks defocused light in the blue spectrum, as well as in the red part of the spectrum (IR) above 700nm, usually seen in small achromat telescopes.
  • The smaller details on craters of the Moon and planetary surfaces are so much more visible!
  • Planeoptically polished; can be used well before the focal point of the optical system, without any loss of sharpness, as a single filter in front of a binocular for afocal projection with digital cameras.
  • Provides the brightest picture of all industrially manufactured colour error-correction systems. Thus, the Fringe-Killer is a must for small refractors!

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€ 65.00 Price excl. German VAT tax (19%): € 54.62

Product Questions

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What's the actual size of your 2" filters in "mm" with and without frame/ring? What step down adapter is suggested from a 52 mm to "-- mm"?
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Question by: Waqas Ahmad on Oct 10, 2016 7:54:00 PM | 1 Answer(s)
What are the threads and pitch of your 1.25" and 2" filters?
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Question by: Anders G. on Sep 20, 2017 12:55:00 PM | 1 Answer(s)
Description

Details

1¼" and 2" Baader Fringe Killer Filter

Planeoptically polished with Phantom Group Coating

Baader Fringe Killer
Baader Fringe Killer

The Fringe-Killer (Fringe = colour fringing) blocks unfocused light in the red part of the spectrum (IR) - but above all suppresses over 50% of the interfering stray light in the blue spectral range - without changing the colour impression of the image.

The most delicate details of lunar craters and planetary surfaces are much more visible!

The Baader Fringe-Killer Filter prevents unwanted colour fringes in both the blue spectral range and in the IR above 700 nm! The visual impact initially corresponds to a minus violet filter, as opposed to this but the image colour remains broadly balanced. In itself a contradiction in terms? It can only be implemented by applying modern DWDM plasma assisted coating technology, which allows the application of approximately 100 individual layers on a flat-optically polished face surface perfectly and reproducibly without compromising visual quality! This fine optical precision tool also allows inexpensive China-refractors to reach the promised imaging performance. The reduction of chromatic aberration corresponds to what is achieved by corrections-lens systems, which usually cost 20 times more.

Example of Sirius with and without the Fringe Killer
For comparison please click

The Baader Fringe Killer Overview

Facts and Figures
  • Removes blue fringing as well as red fringing above 700nm.
  • Forms in the range between 450 to 480 nm with a plateau at around 50% transmission rate, the coating becomes more complex to produce than even the narrowest Nebula filters.
  • Achieved in the passband the highest transmission rate of all previously available colour fringe, whether filter or correction lens. From 486-656 nm all relevant deep sky wavelengths are completely transmitted. Visually this is enough light for even high magnifications.
  • Built-in IR-cut filter for the range 656-1150 nm; perfect for the CCD and Digital Camera-use in deep sky, moon or planets.
The clearly visible colour correction of the Baader Fringe Killer. For comparison please click
The Highlights of the Baader Fringe Killer
  • Provides the brightest image of all industrially produced colour error correction systems. Thus the Fringe Killer is a must for even the smallest telescopes.
  • Removes blue fringing as well as red fringing above 700nm.
  • Cancels the devastating intensity of the disturbing purple fringing in a new form, which was never implemented to date in astronomical filters
  • Even weak nuances remain clearly visible in the planet due to the excellent colour balance.
  • In conjunction with an RG-610 Red Filter produces a narrowband Ha-pass filter with an only 70 nm wide windows and 95% light transmission - at an incredibly low price!
  • The combination with the Neodymium Skyglow Filter (with Phantom-Group-Coating) results in a balanced, breathtaking contrast to the observation of fine lunar and planetary details.
  • Planeoptically polished for perfect sharpness, even when the filter is assembled well before the focal point (or binocular digital camera insert).
  • No deterioration of resolution with high magnification - as would happen with flame-polished (raw polished) glass, commonly used for all sorts of filters!
  • Hight Quality Coating: Plasma-enhanced dielectric coatings result in hard, scratch-resistant and waterproof filters. Almost 50 layers on either side, carefully positioned as not to impair the optical quality of the substrate surface
  • Makes the performance of a simple f/8 economy refractor look like a classic f/15 Fraunhofer achromat. See it to believe it!
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