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Canada's top-tier Telescopes & Accessories

Observing Filters

38 products

  1. $96.76 USD

    Baader: Baader Contrast-Booster Filter, 1.25"

    • 1¼" Contrast Booster Filter that completely eliminates false color
    • Removes the bluish "hue" (=lack of contrast) during lunar, planetary, solar and terrestrial observation
    • Boosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission
    • Planeoptically polished, non-ageing sealed coating edges
     
    Out of Stock
  2. $153.41 USD
    2 in stock
    Availability: usually ships within 10-14 days

    Baader: Baader Contrast-Booster Filter, 2" 

    • 2" Contrast Booster Filter that completely eliminates false color
    • Removes the bluish "hue" (=lack of contrast) during lunar, planetary, solar and terrestrial observation
    • Boosts contrast and sharpness for fast achromatic telescopes - with over 95% transmission
    • Planeoptically polished, non-ageing sealed coating edges
     
  3. $56.59 USD

    Baader: Eyepiece Filter Blue 1.25", 470nm Bandpass, Optically Polished w/MC

    his high-quality filter from Baader is comparable to the Wratten #80A Filter in color. It is a bandpass filter with high transmission at 470nm.

    More About Baader Color Filters

    • Baader Color Filters offer maximum brightness. No reflections, ghosting or stray light.
    • Each filter is fine-optically, plane parallel polished to within 30 seconds of arc!
    • Professionally coated with 7 layers of MC coatings that result in an image free of false reflections.
    • The high quality glass in Baader color filters is only 2 mm thick for easy insertion anywhere in the optical path.
    • Stackable filter cells have both male and female threads, allowing you combine filters to suit your needs.
     
    Out of Stock
  4. $83.37 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Eyepiece Filter Blue 2", 470nm Bandpass, Optically Polished w/MC

    • This high-quality 2" filter from Baader is comparable to the Wratten #80A Filter in color. It is a bandpass filter with high transmission at 470nm.

      More About Baader Color Filters

    • Baader Color Filters offer maximum brightness. No reflections, ghosting or stray light.
    • Each filter is fine-optically, plane parallel polished to within 30 seconds of arc!
    • Professionally coated with 7 layers of MC coatings that result in an image free of false reflections.
    • The high quality glass in Baader color filters is only 2 mm thick for easy insertion anywhere in the optical path.
    • Stackable filter cells have both male and female threads, allowing you combine filters to suit your needs.
    • Baader - Not just another colored filter. Baader Premium Colored Filters bring a new level of quality and performance to planetary contrast enhancement.

     
  5. $56.59 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Eyepiece Filter Dark Blue 1.25", 435nm Bandpass, Optically Polished w/MC

    This high-quality filter from Baader is comparable to the Wratten #38A Filter in color. It is a bandpass filter with high transmission at 435nm.

    More About Baader Color Filters

    • Baader Color Filters offer maximum brightness. No reflections, ghosting or stray light.
    • Each filter is fine-optically, plane parallel polished to within 30 seconds of arc!
    • Professionally coated with 7 layers of MC coatings that result in an image free of false reflections.
    • The high quality glass in Baader color filters is only 2 mm thick for easy insertion anywhere in the optical path.
    • Stackable filter cells have both male and female threads, allowing you combine filters to suit your needs.
     
  6. $83.37 USD

    Baader: Eyepiece Filter Dark Blue 2", 435nm Bandpass, Optically Polished w/MC

    • This high-quality 2" filter from Baader is comparable to the Wratten #38A Filter in color. It is a bandpass filter with high transmission at 435nm.

      More About Baader Color Filters

    • Baader Color Filters offer maximum brightness. No reflections, ghosting or stray light.
    • Each filter is fine-optically, plane parallel polished to within 30 seconds of arc!
    • Professionally coated with 7 layers of MC coatings that result in an image free of false reflections.
    • The high quality glass in Baader color filters is only 2 mm thick for easy insertion anywhere in the optical path.
    • Stackable filter cells have both male and female threads, allowing you combine filters to suit your needs.
    • Baader - Not just another colored filter. Baader Premium Colored Filters bring a new level of quality and performance to planetary contrast enhancement.

     
    Out of Stock
  7. $56.59 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Eyepiece Filter Green 1.25", 500nm Bandpass, Optically Polished w/MC

    • Green 500nm bandpass filter.
    • Provides the sharpest images with achromatic and refractors (eg double star observations.
    • Improves the visibility of CO2 Hoarfrost and ground fog on Mars.
    • Increases contrast between red and blue regions on Jupiter and Saturn.
    • Provides the best contrast for lunar craters Tyco, Copernicus and Kepler.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
  8. $83.37 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Eyepiece Filter Green 2", 500nm Bandpass, Optically Polished w/MC

    • Green 500nm bandpass filter.
    • Provides the sharpest images with achromatic and refractors (eg double star observations.
    • Improves the visibility of CO2 Hoarfrost and ground fog on Mars.
    • Increases contrast between red and blue regions on Jupiter and Saturn.
    • Provides the best contrast for lunar craters Tyco, Copernicus and Kepler.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
  9. $56.59 USD

    Baader: Eyepiece Filter Orange 1.25", 570nm Longpass, Optically Polished w/MC

    • Orange 570nm longpass filter.
    • Contrast enhancement for lunar and planetary observations at dusk.
    • Improves the detection of dark areas on Mars and penetrates the hazy atmosphere of Mars.
    • Shows more detail in the cloud bands of Jupiter and Saturn.
    • Suited for daytime observations of the Moon, Mercury and Venus.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
    Out of Stock
  10. $83.37 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Eyepiece Filter Orange 2", 570nm Longpass, Optically Polished w/MC

    • Orange 570nm longpass filter.
    • Contrast enhancement for lunar and planetary observations at dusk.
    • Improves the detection of dark areas on Mars and penetrates the hazy atmosphere of Mars.
    • Shows more detail in the cloud bands of Jupiter and Saturn.
    • Suited for daytime observations of the Moon, Mercury and Venus.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
  11. $56.59 USD

    Baader: Eyepiece Filter Red 1.25", 610nm Longpass, Optically Polished w/MC

    • Red 610nm longpass filter with steep absorption edge.
    • Filters the H-alpha line from the visible spectrum.
    • Blue and Green lights is almost completely filtered blocked increasing contrast between the light and dark bands on Jupiter and Saturn.
    • Most interesting filter to use for observing the polar caps of Mars.
    • An optimum filter for daily observation of all the planets.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
    Out of Stock
  12. $83.37 USD

    Baader: Eyepiece Filter Red 2", 610nm Longpass, Optically Polished w/MC 

    • Red 610nm longpass filter with steep absorption edge.
    • Filters the H-alpha line from the visible spectrum.
    • Blue and Green lights is almost completely filtered blocked increasing contrast between the light and dark bands on Jupiter and Saturn.
    • Most interesting filter to use for observing the polar caps of Mars.
    • An optimum filter for daily observation of all the planets.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
    Out of Stock
  13. $289.37 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Eyepiece Filter Set 1.25" 6 Colors

    • Fits 1¼" threads
    • Colour Filter Set with 6 colours for contrast enhancement of lunar and planetary observations.
    • Largest free opening of all the colour filters on the market which eliminates any vignetting.
    • Double 7-layer anti-reflection coating with only 0.25% residual reflection per surface (Phantom Group Coating) resulting in no reflections, scatter or dimming.
    • Planeoptically polished for sharp image at high magnification.
    • Included Filters: Dark Blue Filter, Light Blue Filter, Green Filter, Yellow Filter, Orange Filter and Red Filter
    • Non-ageing sealed coating
     
  14. $412.97 USD

    Baader: Eyepiece Filter Set 2" 6 Colors (optically polished) w/MC

    • Fits 2" threads
    • Colour Filter Set with 6 colours for contrast enhancement of lunar and planetary observations.
    • Largest free opening of all the colour filters on the market which eliminates any vignetting.
    • Double 7-layer anti-reflection coating with only 0.25% residual reflection per surface (Phantom Group Coating) resulting in no reflections, scatter or dimming.
    • Planeoptically polished for sharp image at high magnification.
    • Included Filters: Dark Blue Filter, Light Blue Filter, Green Filter, Yellow Filter, Orange Filter and Red Filter
    • Non-ageing sealed coating
     
    Out of Stock
  15. $56.59 USD

    Baader: Eyepiece Filter Yellow 1.25", 495nm Longpass, Optically Polished w/MC

    • Yellow 435nm Longpass filter.
    • Suppresses the secondary blue spectrum when using achromatic and half-apochromatic refractors (increasing image sharpness).
    • For visual and photographic planetary observations.
    • Enhances contrast between the belts on Jupiter.
    • Increases contrast of the lunar and Martian surface.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
    Out of Stock
  16. $83.37 USD

    Baader: Eyepiece Filter Yellow 2", 495nm Longpass, Optically Polished w/MC 

    • Yellow 435nm Longpass filter.
    • Suppresses the secondary blue spectrum when using achromatic and half-apochromatic refractors (increasing image sharpness).
    • For visual and photographic planetary observations.
    • Enhances contrast between the belts on Jupiter.
    • Increases contrast of the lunar and Martian surface.
    • Multi-coated for max contrast – no reflections, scatter or dimming.
    • Planeoptically polished to within 30 seconds of arc for a sharp image at high magnification with non-ageing sealed coating edges.
     
    Out of Stock
  17. $100.88 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Fringe-Killer Filter, 1.25" 

    • 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!

     

     
  18. $144.14 USD

    Baader: Fringe-Killer Filter, 2"

    • 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!
    Out of Stock
  19. $96.76 USD

    Baader: Moon & Skyglowfilter, 1.25" New version w/higher trans

    • Greatly enhances contrast for lunar & planetary work
    • Cuts most streetlights, skyglow and IR for CCD-imaging
    • non-ageing sealed coating edges

      The best visual and photographic filter for contrast enhancement for all Newtonian and SC-mirror telescopes, we have ever offered! Brighter and sharper than ever! Long a dream for all CCD users, our Skyglow & Moon filter with IR Cut coating !! The filter effect is much more neutral in colour and much brighter thanks for our Phantom Group Coating. If you want to escape a city brightened sky - without taking a trip - the new IR Moon & Skyglow filter is the solution.

      Compare with the moon & Skyglow filter before the naked eye, to test the effectiveness. Red and blue colours are extensively strengthened. If you cannot see the GRS (Great Red Spot) due to pollution try this which will allow you to see it.

      In order to establish a precise plan area and to maintain the planarity despite the applied forces through the different layers of coating, a high technical effort is necessary. You have to choose from a large amount of raw glass only the best pieces in tension-free annealed quality to even hope for a good final quality may. All too easily, the glass deforms with improper preparation or coating on older evaporation systems. The final product is almost useless, if not greatest of care is taken at every stage of production.

    • Selective contrast filter, especially suitable for all reflector telescopes.
    • Filters specifics wavelengths especially street lights and skyglow from the Moon without suppressing the visibility of colour and brightness differences. The result is a filter that leaves natural colours intact with RGB significantly enhanced.
    • 95% transmission in the selected spectral ranges.
    • Fits all standard filter threads and can be combined with other filters
    • The filter is also optimised for Astrophotography due to it's full IR-blocking. When used with dSLRs stars are much sharper as the unfocussed IR is blocked.
    • Ultra-hard and durable Ion-beam hardened coatings and may be cleaned anytime without fear, ideally with Baader Optical Wonder Cleaning Fluid.
    Out of Stock
  20. $158.56 USD

    Baader: Moon & Skyglowfilter, 2" New version w/higher trans

    • Greatly enhances contrast for lunar & planetary work
    • Cuts most streetlights, skyglow and IR for CCD-imaging
    • non-ageing sealed coating edges

      The best visual and photographic filter for contrast enhancement for all Newtonian and SC-mirror telescopes, we have ever offered! Brighter and sharper than ever! Long a dream for all CCD users, our Skyglow & Moon filter with IR Cut coating !! The filter effect is much more neutral in colour and much brighter thanks for our Phantom Group Coating. If you want to escape a city brightened sky - without taking a trip - the new IR Moon & Skyglow filter is the solution.

      Compare with the moon & Skyglow filter before the naked eye, to test the effectiveness. Red and blue colours are extensively strengthened. If you cannot see the GRS (Great Red Spot) due to pollution try this which will allow you to see it.

      In order to establish a precise plan area and to maintain the planarity despite the applied forces through the different layers of coating, a high technical effort is necessary. You have to choose from a large amount of raw glass only the best pieces in tension-free annealed quality to even hope for a good final quality may. All too easily, the glass deforms with improper preparation or coating on older evaporation systems. The final product is almost useless, if not greatest of care is taken at every stage of production.

    • Selective contrast filter, especially suitable for all reflector telescopes.
    • Filters specifics wavelengths especially street lights and skyglow from the Moon without suppressing the visibility of colour and brightness differences. The result is a filter that leaves natural colours intact with RGB significantly enhanced.
    • 95% transmission in the selected spectral ranges.
    • Fits all standard filter threads and can be combined with other filters
    • The filter is also optimised for Astrophotography due to it's full IR-blocking. When used with dSLRs stars are much sharper as the unfocussed IR is blocked.
    • Ultra-hard and durable Ion-beam hardened coatings and may be cleaned anytime without fear, ideally with Baader Optical Wonder Cleaning Fluid.
    Out of Stock
  21. $52.47 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Neutral Density Filter 1.25", Multicoated / ND 0.6

    • Baader 1.25" Neutral Density Filter with optical density ND 0.6 - Transmission 25% - Reduction factor 4.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).

     

     
  22. $88.52 USD

    Baader: Neutral Density Filter 2", Multicoated / ND 0.6

    • Baader 2" Neutral Density Filter with optical density ND 0.6 - Transmission 25% - Reduction factor 4.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).
     
     
    Out of Stock
  23. $52.47 USD

    Baader: Neutral Density Filter 1.25", Multicoated / ND 0.9

    • Baader 1.25" Neutral Density Filter with optical density ND 0.9 - Transmission 12.5% - Reduction factor 8.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).

     

     
    Out of Stock
  24. $88.52 USD

    Baader: Neutral Density Filter 2", Multicoated / ND 0.9 

    • Baader 2" Neutral Density Filter with optical density ND 0.9 - Transmission 12.5% - Reduction factor 8.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).
     
     
    Out of Stock
  25. $52.47 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Neutral Density Filter 1.25", Multicoated / ND 1.8 

    • Baader 1.25" Neutral Density Filter with optical density ND 1.8 - Transmission 1.0% - Reduction factor 64.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).
  26. $88.52 USD

    Baader: Neutral Density Filter 2", Multicoated / ND 1.8

    • Baader 2" Neutral Density Filter with optical density ND 1.8 - Transmission 1.5% - Reduction factor 64.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).
    Out of Stock
  27. $52.47 USD

    Baader: Neutral Density Filter 1.25", Multicoated / ND 3.0

    • Baader 1.25" Neutral Density Filter with optical density ND 3.0 - Transmission 0.1% - Reduction factor 1000.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).
    Out of Stock
  28. $88.52 USD

    Baader: Neutral Density Filter 2", Multicoated / ND 3.0

    • Baader 2" Neutral Density Filter with optical density ND 3.0 - Transmission 0.1% - Reduction factor 1000.
    • For perfect energy management during Lunar and Solar observation. Suitable for solar observing only as an additional filter!
    • If you need to reduce glare and want to use a filter ahead of the focal point (e.g. before a binocular), then the neutral density filters are just right.
    • Fine optical polish results in no loss of sharpness at high magnifications even with a filter position 20-30cm in front of the focal point.
    • Phantom Group coated. No ghosting, reflections or stray light.
    • Threaded both sides of the glass allows combination with other filters (e.g. Baader Colour Filters).
    Out of Stock
  29. $114.27 USD
    2 in stock
    Availability: usually ships within 10-14 days

    Baader: Baader O-III Nebula Filter, 1.25" Visual

    • ultra hard and bright O-III visual contrast for 6" and larger telescopes
    • no visual color fringing, just pure O-III
    • non-ageing sealed coating edges
  30. $196.67 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Baader O-III Nebula Filter, 2" Visual

    • ultra hard and bright O-III visual contrast for 6" and larger telescopes
    • no visual color fringing, just pure O-III
    • non-ageing sealed coating edges
  31. $57.62 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Baader Polarization Filter, 1.25" Single

    • Baader 1.25" Polarizing Filter - Ideal for solar and planetary observations.
    • For solar work in conjunction with Baader AstroSolar Safety Film or Baader Herschel Wedge Prism (never use any eyepiece filter for solar observation without objective front filter).
    • Enhances contrast during planetary observation.
    • Non-ageing sealed coating edges.
  32. $101.91 USD

    Baader: Baader Polarization Filter, 1.25" Double

    • Baader 1.25" Double Polarizing Filter - Ideal for solar and planetary observations.
    • For solar work in conjunction with Baader AstroSolar Safety Film or Baader Herschel Wedge Prism (never use any eyepiece filter for solar observation without objective front filter).
    • Rotatable filter cell allows continous adjustment of brightness for comfortable viewing.
    • Enhances contrast during planetary observation.
    • Non-ageing sealed coating edges.
    Out of Stock
  33. $87.49 USD

    Baader: Baader Polarization Filter, 2" Single

    • Baader 2" Polarizing Filter - Ideal for solar and planetary observations.
    • For solar work in conjunction with Baader AstroSolar Safety Film or Baader Herschel Wedge Prism (never use any eyepiece filter for solar observation without objective front filter).
    • Enhances contrast during planetary observation.
    • Non-ageing sealed coating edges.
    Out of Stock
  34. $143.11 USD
    1 in stock
    Availability: usually ships within 10-14 days

    Baader: Baader Polarization Filter, 2" Double 

    • Baader 2" Double Polarizing Filter - Ideal for solar and planetary observations.
    • For solar work in conjunction with Baader AstroSolar Safety Film or Baader Herschel Wedge Prism (never use any eyepiece filter for solar observation without objective front filter).
    • Rotatable filter cell allows continous adjustment of brightness for comfortable viewing.
    • Enhances contrast during planetary observation.
    • Non-ageing sealed coating edges.
  35. $98.82 USD

    Baader: Baader Semi-APO Filter 1.25" 

    • Two filters made into one for maximum brightness
    • Combines Fringe-Killer with Moon & Skyglow for Semi-APO contrast with refractors
    • Non-ageing sealed coating edges
    Out of Stock
  36. $176.07 USD

    Baader: Baader Semi-APO Filter 2"

    • Two filters made into one for maximum brightness
    • Combines Fringe-Killer with Moon & Skyglow for Semi-APO contrast with refractors
    • Non-ageing sealed coating edges
    Out of Stock
  37. $103.97 USD

    Baader: Baader Solar Continuum Filter, 1.25"

    • Baader 1.25" Solar Continuum Filter, 10nm / CWL 540nm
    • A must for owners of achromatic refractors. This filter cuts the spectral range transmitting a specific spectral range around 540nm, completely cutting out blue and red wavelengths in an area of the lens system that where the optics are at their sharpest.
    • Enhances contrast and reduces the effect of atmospheric turbulence.
    • This filter must be used in conjunction with a Baader Herschel Wedge or Baader AstroSolar Safety Film for solar observations otherwise eye or equipment damage may occur.
    • Planeoptically polished, non-ageing sealed coating edges.
    Out of Stock
  38. $193.58 USD

    Baader: Baader Solar Continuum Filter, 2"

    • Baader 2" Solar Continuum Filter, 10nm / CWL 540nm
    • A must for owners of achromatic refractors. This filter cuts the spectral range transmitting a specific spectral range around 540nm, completely cutting out blue and red wavelengths in an area of the lens system that where the optics are at their sharpest.
    • Enhances contrast and reduces the effect of atmospheric turbulence.
    • This filter must be used in conjunction with a Baader Herschel Wedge or Baader AstroSolar Safety Film for solar observations otherwise eye or equipment damage may occur.
    • Planeoptically polished, non-ageing sealed coating edges.
    Out of Stock
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