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  1. 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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    (48 States)
    Model#: HA5-27R
    $330.00

  2. Astrodon - NIR Tricolor - 50mm NIRL Luminance Filter

    Astrodon - NIR Tricolor - 50mm NIRL Luminance Filter

    The NIR region remains largely unexplored by amateur imagers. Perhaps this is due to the impression that the Si CCD camera is not sufficiently sensitive in the NIR.

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    (48 States)
    Model#: NIRL-50R
    $335.00

  3. Astrodon - Photometric Sloan - 50mm Unmounted Gen2 z_s Edge Blackened Square Filter

    Astrodon - Photometric Sloan - 50mm Unmounted Gen2 z_s 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_s2-50S
    $440.00

  4. 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

  5. Astrodon - Narrowband - 36mm Unmounted OIII 5 nm Filter

    Astrodon - Narrowband - 36mm Unmounted OIII 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#: OIII5-36R
    $435.00

  6. Astrodon - 50mm" Gen 2 Parfocal UV Blocked Clear Filter

    Astrodon - 50mm" Gen 2 Parfocal UV Blocked Clear Filter

    Astrodon's new improvements of photometric Sloan filters generation 2 feature excellent out of band clocking and other edge-blackended compounds to reduce stray light reflections to assist in CCD imaging.

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    (48 States)
    Model#: C2_50R_Gen2
    $250.00

  7. Astrodon - Narrowband - 50mm Unmounted H-Alpha 5 nm Filter

    Astrodon - Narrowband - 50mm Unmounted 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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    (48 States)
    Model#: HA5-50R
    $725.00

  8. Astrodon - ExoPlanet-BB in 31 mm inserts for QSI

    Astrodon - ExoPlanet-BB in 31 mm inserts for QSI

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

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    Model#: XOPBB-31R
    $175.00

  9. Astrodon - Photometric Sloan - 50mm Unmounted Gen2 g' Edge Blackened Square Filter

    Astrodon - Photometric Sloan - 50mm Unmounted Gen2 g' 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#: g'2-50S
    $440.00

  10. Astrodon Photometric UVBRIc 50mm Unmounted V Edge Blackened Filter

    Astrodon - Photometric UVBRIc - 50mm Unmounted V 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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    (48 States)
    Model#: V*-50R
    $400.00

  11. FL3-AD-LRGBI

    Astrodon - 31mm LRGB I-Series Filters

    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#: FL3-AD-LRGBI
    $450.00

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

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

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    (48 States)
    Model#: LRGB2-I31R
    $525.00

  13. Astrodon - 1.25" Mounted Astrodon Gen2 I-Series LRGB Filters (set of 4)

    Astrodon - 1.25" Mounted Astrodon 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-I27R
    $475.00

  14. Astrodon - Tru-Balance I-Series - 50mm Generation 2 GREEN Filter

    Astrodon - Tru-Balance I-Series - 50mm Generation 2 GREEN 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
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    (48 States)
    Model#: G2-I50R
    $210.00

  15. Astrodon - Narrowband - 50mm Unmounted H-Alpha 5 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted H-Alpha 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.

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA5-50S
    $875.00

  16. Astrodon Photometric Sloan 50mm Unmounted Gen2 g' Edge Blackened Filter

    Astrodon - Photometric Sloan - 50mm Unmounted 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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    FREE SHIPPING
    (48 States)
    Model#: g'2-50R
    $400.00

  17. Astrodon - Tru-Balance E-Series - 1.25" Generation 2 Mounted GREEN Filter

    Astrodon - Tru-Balance E-Series - 1.25" Generation 2 Mounted GREEN 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
    Model#: G2-E27R
    $125.00

  18. Astrodon - Narrowband - 50mm Unmounted OIII 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted OIII 3 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),

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    (48 States)
    Model#: OIII3-50S
    $1,250.00

  19. Astrodon Photometric Sloan 50mm Unmounted Gen2 i' Edge Blackened Filter

    Astrodon - Photometric Sloan - 50mm Unmounted 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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    FREE SHIPPING
    (48 States)
    Model#: i'2-50R
    $400.00

  20. Astrodon 50mm Unmounted Clear Square Filter (UV-Blocked, No NIR Blocking)

    Astrodon - 50mm Unmounted Clear Square Filter (UV-Blocked, No NIR Blocking)

    Clear optical windows Pass all frequency of light to the detector.

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    (48 States)
    Model#: C2-50S
    $320.00

Items 41 to 60 of 99 total

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