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Canada's top-tier Telescopes & Accessories

Nebula Filters

12 products

  1. Astro Hutech: The IDAS HEUIB-II (H-alpha Enhanced UV IR Blocking) filter is designed for enhanced spectrum DSLR's and one-shot color CCD astronomical cameras.

    Besides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, it isolates the common H-alpha line relative to the surrounding extreme red end of the spectrum, making it easy to bring out the faint H-alpha emission nebulosity of astronomical photos, yet retain the background color balance of broadband photos.

    Available in 52mm and 48mm sizes mounted in standard camera filter rings, 37mm size mounted for the Canon MFA, and unmounted in 36mm and 49mm sizes. The filter is also available as a Nikon front filter.

    Some comparison shots taken with the enhanced Canon 6DH (standard Canon UV/IR blocking filter vs. HEUIB-II filter) show a clear difference both in background sky color balance and contrast of H-alpha nebulosity in the extremely faint object IC1396. Note the good background color balance as shown in the histograms of the individual color channels of the HEUIB-II filtered image.

    The HEUIB-II filter also returns normal daylight color balance to spectrum-enhanced cameras as can be seen in this photo at right taken with normal DSLR auto-white-balance (AWB) enabled.

    $169.00 USD
    1 in stock


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  2. Astro Hutech: The IDAS HEUIB-II (H-alpha Enhanced UV IR Blocking) filter is designed for enhanced spectrum DSLR's and one-shot color CCD astronomical cameras.

    Besides removing the IR and UV ends of the spectrum which are often out of focus in refractive optics, it isolates the common H-alpha line relative to the surrounding extreme red end of the spectrum, making it easy to bring out the faint H-alpha emission nebulosity of astronomical photos, yet retain the background color balance of broadband photos.

    Available in 52mm and 48mm sizes mounted in standard camera filter rings, 37mm size mounted for the Canon MFA, and unmounted in 36mm and 49mm sizes. The filter is also available as a Nikon front filter.

    Some comparison shots taken with the enhanced Canon 6DH (standard Canon UV/IR blocking filter vs. HEUIB-II filter) show a clear difference both in background sky color balance and contrast of H-alpha nebulosity in the extremely faint object IC1396. Note the good background color balance as shown in the histograms of the individual color channels of the HEUIB-II filtered image.

    The HEUIB-II filter also returns normal daylight color balance to spectrum-enhanced cameras as can be seen in this photo at right taken with normal DSLR auto-white-balance (AWB) enabled.

    $199.00 USD
    1 in stock


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  3. Baader: Baader UHC-S / L-Booster-Filter 1¼"

    • Visual and photographic UHC-S Nebula filter
    • Ultra High Contrast L Filter blocks city lights and increases contrast of Nebula
    • Planeoptically polished for the highest image quality.
    • Creates a much brighter image than a conventional Nebula filter.
    $89.00 USD

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  4. Baader: Baader UHC-S Nebula Filter 2"

    • Visual and photographic UHC-S Nebula filter
    • Ultra High Contrast L Filter blocks city lights and increases contrast of Nebula
    • Planeoptically polished for the highest image quality.
    • Creates a much brighter image than a conventional Nebula filter.
    $147.00 USD

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  5. Baader: Baader UHC-S Nebula Filter 50.4mm Round, L-Booster

    • Visual and photographic UHC-S Nebula filter
    • Ultra High Contrast L Filter blocks city lights and increases contrast of Nebula
    • Planeoptically polished for the highest image quality.
    • Creates a much brighter image than a conventional Nebula filter.
    $184.00 USD

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  6. Baader: 36mm Baader UHC-S DeepSky Filter
    Planeoptically Polished

    Planeoptically polished for the highest images quality. Produces a much brighter image with superb contrast than a conventional Nebula filter. Excellent for openings from 100mm.

    Baader UHC-S Nebula Filter with highest transmission and realistic star colours!
    A new class of LPR Nebula filters finally delivering the happy medium, with enough light for smaller telescope openings at the same time with the high contrast of classical UHC filter.

    Light pollution from street lights is blocked carefully. The filter is the sensible addition to all previous deep sky and UHC filters. Both for visual as well as photographic use.

    All filters produce a brighter image and are optically polished with ultra-hard dielectric coatings. They are absolutely scratch resistant and can be cleaned as often as needed, ideally with Baader Optical Wonder Cleaning Fluid.
    All Baader UHC-S DeepSky Filter
    1¼", 2", 50.4 mm, 50x50 mm

    ref baader : 2459420

    $104.00 USD

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  7. Baader: Baader UHC-S Nebula Filter 50x50 Square, L-Booster

    • Visual and photographic UHC-S Nebula filter
    • Ultra High Contrast L Filter blocks city lights and increases contrast of Nebula
    • Planeoptically polished for the highest image quality.
    • Creates a much brighter image than a conventional Nebula filter.
    $226.00 USD

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  8. Optolong: The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha(656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

    $55.00 USD
    6 in stock


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  9. Optolong: The UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high & low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII (496nm and 500nm), H-beta (486nm), NII (654nm and 658nm), H-alpha (656nm) as well as SII (672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.

    $85.00 USD
    6 in stock


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  10. Optolong: This UHC, or Ultra High Contrast, filter from Optolong provides a bit more contrast than the CLS filter, but works in much the same way. By reducing the contrast-killing effects of light pollution caused by both artificial and natural sources, the background sky becomes darker, increasing the visibility of your favorite deep-sky objects. Skyglow, which is caused by neutral oxygen in the atmosphere, as well as light from high and low pressure sodium vapor lights and mercury vapor lamps are suppressed significantly, which means you can view or image from areas of heavy light pollution.

    Optolong’s UHC filter lets desirable wavelengths pass at a peak transmission of 95%, including emission lines at OIII, H-Beta, NII, H-Alpha, and SII. This filter also has a substantial red passband, so objects like the Orion Nebula look awesome!

    The Optolong EOS APS UHC Clip Filter is made with Schott glass that has been multi-coated with an ion-assisted deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. Each filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and then laser engraved.

    Using a Clip Filter on your Canon APS-C Camera

    The Optolong EOS APS Clip filter can be inserted without tools; just use your fingers to insert or remove the filter. Once inserted correctly, it cannot unintentionally fall out.
    No changes to the housing of Canon EOS DSLR are required. All lens functions will work with the Clip installed, including focus, screen, and image stabilization,
    The Optolong clip filter prevents dust from settling on the sensor during long exposures.
    The APS-C clip filters are compatible with EOS APS-C series cameras, including EOS 1100D/600D/60D, etc. If you have a full frame EOS camera, Optolong offers clip filters for these cameras as well.
    Optolong Clip Filters do not function with the Canon EF-S series lenses. These lenses invade the space inside the camera body that would normally be taken up by the clip filter.
    To use EOS/T2 and 2” adapters to attach your camera to a telescope you’ll need to insert the Clip-Filter first and then install the desired lens adapters.
    Quality Filter Materials:

    Schott B260 substrate material from Germany, 1.0mm thick
    CNC machined and black anodized aero-metal filter cell that is ultra-thin to provide largest clear aperture; Laser-engraved to prevent fading
    Multiple layers of anti-reflection non-cementing coatings applied via electron-beam gun evaporation with Ion-assisted deposition
    Optolong Filter Manufacturing Processes and Parameters

    Filter substrate is fine-optically polished to 1/4 wave and <30 parallelism over both surfaces
    Surface quality, according to MIL-O-13830, is 60/40
    95% transmission of main nebula emission lines (i.e. H-alpha 656nm, OIII 496nm and 500nm, SII 672nm and H-beta 486nm
    0.1% transmission of off-band, specifically the major emission lines of artificial light pollution (i.e. Na 589nm, Hg 435nm and 578nm)
    Optolong’s planetary rotation system is a homogenous and precise coating procedure that ensures both high transmission of pass-band and optical density of off-band
    Each filter comes with a plastic case with high pressure EVA case lining

    $95.00 USD

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  11. Optolong: The Optolong CLS-CCD filter will improve contrast and increase the visibility of weak outer regions on most emitted, planetary and supernova residual nebulae from polluted locations in a color imaging camera.

    The infrared wavelength of 700-1100nm is cut on the Optolong CLS-CCD filter, which makes it different from the standard CLS filter and makes the CLS-CCD a photographic filter only. A separate IR-cut filter is not necessary when imaging with the CLS-CCD since the IR has already been cut.

    The Optolong CLS-CCD filter works by specifically reducing the transmission of wavelengths of light pollution, in particular the artificial type caused by vapors of sodium vapor and mercury vapor at high and low pressure. The use of a CLS-CCD filter will also increase the contrast by reducing the light radiation caused by the neutral oxygen emissions normally observed in the atmosphere.

    The Opterster CLS-CCD EOS APS-C Clip Filter consists of multi-layered Schott glass with ion deposition technology to ensure scratch resistance and stability on the central wavelength, or CWL. The filter cell is made of light and solid metal, CNC machined, sandblasted, black anodized and then laser engraved.

    Using a Clip Filter on Your Canon APS-C Camera

    The Optolong CLS-CCD clip filter can be inserted without tools; Simply use your fingers to insert or remove the filter. Once inserted correctly, it can not fall unintentionally.
    No modification of the Canon EOS DSLR case is required. All lens functions will work with the installed clip, including focus, screen and image stabilization,
    The Optolong fog filter prevents dust from settling on the sensor during long exposures.
    APS-C clip filters are compatible with EOS APS-C series cameras, including EOS 1100D / 600D / 60D, and so on. If you have a full frame EOS camera, Optolong also offers filters for these cameras.
    Optolong Clip filters do not work with the Canon EF-S series lenses. These lenses invade the interior space of the camera body that would normally be supported by the clip filter.
    To use the EOS / T2 and 2 "adapters to attach your camera to a telescope, you must first insert the Clip-Filter and then install the desired lens adapters.


    Transmission characteristics of the CLS-CCD filter

    95% transmission H-Alpha 656nm
    95% transmission OIII 496nm and 500nm
    95% transmission SII 672nm
    95% H-Beta transmission 486nm
    High transmission NII 654nm and 658nm
    0.1% Hg transmission at 435 nm and 578 nm
    0.1% Na transmission at 589 nm
    Blocks IR transmission 700-1100nm


    Quality filter materials:

    • Schott B260 substrate material from Germany, 1.0 mm thick
    • Anodized and CNC machined aero-metal filter cell to provide the largest net opening; Laser engraved to avoid fading
    • Several layers of cement-free anti-reflective coatings applied by evaporation from a gun to electron beams with ion assisted deposition
    • Optolong Filter Manufacturing Processes and Parameters
    • The filter substrate is optically polished at a 1/4 wave and parallelism <30 on both surfaces
    • The quality of the surface, according to MIL-O-13830, is 60/40
    • The main emission lines of nebulae have a transmission of 95%
    • Out-of-band transmission (main artificial radiation) is 0.1%
    • High-pass transmission of the bandwidth and out-of-band optical density is ensured by Optolong's planetary rotation system, a homogeneous and precise coating procedure
    • Each filter comes with a plastic housing with high-pressure EVA liner
    $115.00 USD
    1 in stock


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  12. Optolong: The Optolong H-Alpha 7nm is a very narrow emission-line filter that works by permitting a 7nm bandwidth of light, focused on the 656nm wavelength through, and blocking the transmission of contrast-killing light pollution wavelengths. Wavelengths that are in charge of natural light pollution, or skyglow, are radically decreased, as is artificial light pollution brought about by high and low pressure sodium and mercury vapor lights. The outcome is a high contrast image that uncovers the H-alpha line in all its brilliance.

    This Optolong H-Alpha EOS APS Clip filter will give a well defined contrast between the skyglow ackground and H-alpha transmitting objects, but since it has a FWHM of only 7nm, you won't see the same number of stars in the last picture as you would with the Optolong 12nm H-Alpha Filter. Utilize this filter alone for CCD or DSLR imaging, or utilize together with OIII 6.5nm and SII 6.5nm filters to get a tricolor picture of vaporous nebulae from light polluted areas.

    The Optolong EOS APS H-Alpha 7nm Filter is made with Schott glass that has been multi-coated with  ion-assisted deposition technology to guarantee scratch resistance and soundness on the central wavelength, or CWL. The filter cell is made of lightweight, strong metal and is CNC machined, sand-blasted, black anodized, and  finally laser engraved.

    $219.00 USD

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