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  1. Astrodon Narrowband 1.25" Mounted H-a 3 nm Filter

    Astrodon - Narrowband - 1.25" Mounted H-Alpha 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

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    (48 States)
    Model#: HA3-27R
    $490.00

  2. Astrodon 1.25" ExoPlanet-BB Filter

    Astrodon - 1.25" Mounted ExoPlanet-BB Filter

    Astrodon introduces the ExoPlanet-BB filter for use in amateur-scale telescopes to measure light curves of exoplanets.

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    Model#: XOPBB-27R
    $185.00

  3. Astrodon - Narrowband - 36mm Unmounted OIII 3 nm Filter

    Astrodon - Narrowband - 36mm Unmounted OIII 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

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    (48 States)
    Model#: OIII3-36R
    $650.00

  4. Astrodon - Narrowband - 50mm Unmounted SII 5 nm Filter

    Astrodon - Narrowband - 50mm Unmounted SII 5 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII, 501 nm), sulfur (SII, 672nm) and others.

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    (48 States)
    Model#: SII5-50R
    $725.00

  5. Astrodon - 31mm LRGB E-Series Filters

    Astrodon - 31mm LRGB E-Series Filters

    Astrodon is also providing its latest Generation 2 E-Series 1.25" filters mounted in 31 mm inserts specifically for the popular QSI CCD cameras, such as the QSI532 and QSI583.  

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    (48 States)
    Model#: FL3-AD-LRGBE
    $450.00

  6. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - 1.25" Mounted Rc Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.  H. Johnson in the 1950s and A.W.J. Cousins in the 1970s designed these filters for photomultiplier tubes (PMT).

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    Model#: Rc*-27R
    $200.00

  7. Astrodon 50mm Unmounted Gen2 I-Series LRGB Filters (set of 4)

    Astrodon - 50mm Unmounted Gen2 I-Series LRGB Filters (set of 4)

    TRU-BALANCE FILTERSSIMPLIFY YOUR IMAGINGGreat Filters Just Got Better - Generation 2 Now Shipping!  Astrodon Tru-Balance RGB filters have revolutionized CCD imaging ... Learn More
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    (48 States)
    Model#: LRGB2-I50R
    $950.00

  8. Astrodon - Narrowband - 50mm Unmounted H-Alpha 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted H-Alpha 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

    ...
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    FREE SHIPPING
    (48 States)
    Model#: HA3-50R
    $995.00

  9. Astrodon Photometric Sloan 1.25" Mounted Gen2 g' Edge Blackened Filter

    Astrodon - Photometric Sloan - 1.25" Mounted Gen2 g' Edge Blackened Filter

    NEW!  Astrodon introduces Generation 2 Sloan filters based upon ongoing input from research organizations.  The changes include

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    Model#: g'2-27R
    $200.00

  10. Astrodon Tru-Balance E-Series 1.25" Mounted LRGB Filters

    Astrodon - 1.25" Mounted Gen2 E-Series LRGB Filters (set of 4)

    Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to ease-of-use, high optical throughput and great resulting color for galaxies, star clusters and nebulae.

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    (48 States)
    Model#: LRGB2-E27R
    $475.00

  11. Astrodon Narrowband 50mm Unmounted SII 5 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted SII 5 nm Square Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII, 501 nm), sulfur (SII, 672nm) and others.

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    (48 States)
    Model#: SII5-50S
    $875.00

  12. Astrodon - Photometric Sloan - 1.25" Mounted Gen2 i' Edge Blackened Filter

    Astrodon - Photometric Sloan - 1.25" Mounted Gen2 i' Edge Blackened Filter

    NEW!  Astrodon introduces Generation 2 Sloan filters based upon ongoing input from research organizations.  The changes include

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    Model#: i'2-27R
    $200.00

  13. Astrodon - Tru-Balance E-Series - 50mm dia. CRGB Filter

    Astrodon - Tru-Balance E-Series - 50mm dia. CRGB Filter

    TRU-BALANCE FILTERSSIMPLIFY YOUR IMAGINGGreat Filters Just Got Better - Generation 2 Now Shipping!        Astrodon Tru-Balance RGB filters have revolutionized CCD imaging ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: CRGB2-E50R
    $875.00

  14. Astrodon - Narrowband - 1.25" Mounted NII 3 nm Filter

    Astrodon - Narrowband - 1.25" Mounted NII 3 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII),

    ...
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    (48 States)
    Model#: NII3-27R
    $490.00

  15. Astrodon - Photometric Sloan - 50mm Unmounted Gen2 z' Edge Blackened Square Filter

    Astrodon - Photometric Sloan - 50mm Unmounted Gen2 z' Edge Blackened Square Filter

    NEW!  Astrodon introduces Generation 2 Sloan filters based upon ongoing input from research organizations.  The changes include

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    (48 States)
    Model#: z'2-50S
    $440.00

  16. Astrodon Narrowband - 1.25" Mounted H-a 5 nm Filter

    Astrodon - Narrowband - 1.25" Mounted H-Alpha 5 nm Filter

    Narrowband (NB) filters  enhance contrast of emission objects by accepting only a narrow range of wavelengths around the emission lines of hydrogen (H-a, 656 nm), oxygen (OIII, 501 nm), sulfur (SII, 672nm) and others.

    ...
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    FREE SHIPPING
    (48 States)
    Model#: HA5-27R
    $330.00

  17. Astrodon 65mm Unmounted Gen2 E-Series LRGB Square Filters (set of 4) with 5 nm H-a Filter

    Astrodon - 65mm Unmounted Gen2 E-Series LRGB Square Filters (set of 4) with 5 nm H-Alpha Filter

    The E-Series is designed for the red-sensitive Kodak full-frame detectors with the goal of equalizing the fluxes, and hence, the signal-to-noise, for the red, green and blue filters.

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    (48 States)
    Model#: LRGB2HA5-E65S
    $3,150.00

  18. Astrodon - 50mm Gen 2 Unmounted Y Filter

    Astrodon - 50mm Gen 2 Unmounted Y Filter

    NEW!  Astrodon introduces Generation 2 Sloan filters based upon ongoing input from research organizations.  The changes include

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    (48 States)
    Model#: Y2-50R
    $400.00

  19. Astrodon UVenus 50mm Unmounted UV Filter

    Astrodon - UVenus - 50mm Unmounted UV Filter

    Astrodon introduces a breakthrough in UV filters for CCD imaging. A  durable, hard--coated UV filter of the highest quality having the best transmission available.

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    (48 States)
    Model#: UVenus-50R
    $385.00

  20. Astrodon Gen2 E-Series LRGB (set of 4) Mounted in 31mm Inserts

    Astrodon - Gen2 E-Series LRGB (set of 4) Mounted in 31mm Inserts

    Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to ease-of-use, high optical throughput and great resulting color for galaxies, star clusters and nebulae.  There are two varieties of Tru-Balance filters - E-Series and I-Series.

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    (48 States)
    Model#: LRGB2-E31R
    $525.00

Items 1 to 20 of 97 total

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