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  1. Astrodon 50mm UVenus Unmounted Filter

    Astrodon - 50mm UVenus Unmounted 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

    Available

    $385.00

  2. Astrodon - Photometric Sloan - 50mm Gen 2 Unmounted Square Y Filter

    Astrodon - Photometric Sloan - 50mm Gen 2 Unmounted Square 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#: Y2-50S

    Available

    $440.00

  3. Astrodon - 36mm H-Alpha 5nm Narrowband Filter - Unmounted

    Astrodon - 36mm H-Alpha 5nm Narrowband Filter - Unmounted

    Bring out the faint structures In nebulae with the Astrodon H-Alpha Narrowband 36mm Unmounted Filter. ... Learn More
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    (48 States)
    Model#: HA5-36R

    In Stock

    $435.00

  4. Astrodon - Narrowband - 1.25" Mounted H-Alpha 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

    Available

    $490.00

  5. Astrodon 50mm Unmounted Clear UV Blocking (No NIR Blocking) Filter

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

    UV-Blocked Clear filters with 395 nm cut-on and 97%T to 1000 nm often purchased with Astrodon photometric filters.

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    (48 States)
    Model#: C2-50R

    Available

    $270.00

  6. Astrodon Photometric UVBRIc 50mm Unmounted Rc Edge Blackened Filter

    Astrodon - Photometric UVBRIc - Johnson-Cousins 50mm Unmounted Rc Edge Blackened Filter

    Astrodon Photometrics - UVBRI filters have been the standard for photometric measurements for decades.

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    (48 States)
    Model#: RC-50R

    In Stock

    $400.00

  7. Astrodon - Gen2 E-Series LRGB Set - 36mm Unmounted Set

    Astrodon - Gen2 E-Series LRGB Set - 36mm Unmounted Set

    Astrodon 31mm Gen2 LRGB E-series filters are the pinnacle of high performance CCD filters. The E-Series Gen2 filters were designed for cameras containing the full-frame KAF8300, KAF3200, KAF6303, KAF16200, KAF16803 sensors, as well as most Sony and back-thinned sensors. ... Learn More
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    (48 States)
    Model#: LRGB2-E36R

    In Stock

    $675.00

  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

    Available

    $175.00

  9. Astrodon Narrowband 50mm Unmounted NII 3 nm Square Filter

    Astrodon - Narrowband - 50mm Unmounted NII 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#: NII3-50S

    Available

    $1,250.00

  10. Astrodon - Photometric UVBRIc - 50mm Unmounted Johnson/Cousins UV Edge Blackened Filter

    Astrodon - Photometric UVBRIc - 50mm Unmounted Johnson/Cousins UV Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.

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    (48 States)
    Model#: UV-50R

    Available

    $400.00

  11. Astrodon Photometric Sloan 50mm Unmounted Gen2 u' Edge Blackened Square Filter

    Astrodon - Photometric Sloan - 50mm Unmounted Gen2 u' 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#: u'2-50S

    Available

    $440.00

  12. Astrodon Unmounted LRGB Gen2 I-Series 50mm Set

    Astrodon - Unmounted LRGB Gen2 I-Series 50mm Set

    The Astrodon I-Series Unmounted Gen2 Filters set are designed to approximately equalize the flux of  Interline CCD detectors (formerly Kodak), including compensation for the solar photon flux.  The I-Series filters compensate for the lower red response of these Interline detectors affecting the design of the Green and Red filters.

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    (48 States)
    Model#: LRGB2-I50R

    Available

    $950.00

  13. Astrodon - Photometric UBVRIc - 1.25" Mounted Johnson/Cousins V Edge Blackened Filter

    Astrodon - Photometric UBVRIc - 1.25" Mounted Johnson/Cousins V Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.

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    Model#: V-27R

    Available

    $200.00

  14. Astrodon - Photometric Sloan - 50mm Unmounted Gen2 r' Edge Blackened Square Filter

    Astrodon - Photometric Sloan - 50mm Unmounted Gen2 r' 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#: r'2-50S

    Available

    $440.00

  15. Astrodon - 31mm H-Alpha 3nm Narrowband Filter - Unmounted

    Astrodon - 31mm H-Alpha 3nm Narrowband Filter - Unmounted

    Bring out the faint structures In nebulae with the Astrodon H-Alpha Narrowband 31mm 3nm filter. 3nm filters will greatly increase contrast and are a great way to image in light polluted locations. Setting a new bar of performance and durability for imaging and research. ... Learn More
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    (48 States)
    Model#: HA3-31R

    Available

    $490.00

  16. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - 50mm Unmounted Square Johnson-Cousins Ic 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#: IC-50S

    Available

    $440.00

  17. Astrodon Photometric Sloan 50mm Unmounted Gen2 z' Edge Blackened Filter

    Astrodon - Photometric Sloan - 50mm Unmounted Gen2 z' Edge Blackened 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'2-50R

    Available

    $400.00

  18. Astrodon - 1.25" OIII 3nm Narrowband Filter - Mounted

    Astrodon - 1.25" OIII 3nm Narrowband Filter - Mounted

    Bring out the faint structures In nebulae with the Astrodon OIII Narrowband 31mm 3nm filter. 3nm filters will greatly increase contrast and are a great way to image in light polluted locations. Setting a new bar of performance and durability for imaging and research. ... Learn More
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    (48 States)
    Model#: OIII3-27R

    Available

    $490.00

  19. Astrodon Narrowband 50mm Unmounted Red Continuum 5nm Filter

    Astrodon - Narrowband - 50mm Unmounted Red Continuum 5nm 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#: RedCon5-50R

    Available

    $725.00

  20. Astrodon - Photometric Sloan - 1.25" Gen 2 Mounted Y Filter

    Astrodon - Photometric Sloan - 1.25" Gen 2 Mounted Y Filter

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

    ...
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    Model#: Y2-27R

    Available

    $200.00

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