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  1. Astrodon NIR Tricolor - 50mm NIRL Luminance Round Unmounted Filter

    Astrodon - NIR Tricolor - 50mm NIRL Luminance Round Unmounted Filter

    Astrodon's NIR filters allow you to explore the largely unvisited region of near-IR light found in many nebulae and galaxies. This Astrodon NIR filter is 50mm round and unmounted to fit in your 50mm filter wheel.

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    (48 States)
    Model#: NIRL-50R

    Available - Ships in 2-4 Days

    $335.00

  2. Astrodon - 1.25" OIII 5nm Narrowband Filter - Mounted

    Astrodon - 1.25" OIII 5nm Narrowband Filter - Mounted

    Bring out the faint structures In nebulae with the Astrodon OIII Narrowband 1.25" 5nm filter. Setting a new bar of performance and durability for imaging and research. ... Learn More
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    (48 States)
    Model#: OIII5-27R

    Available - Ships in 2-4 Days

    $330.00

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

    Astrodon - Narrowband - 50x50mm Unmounted Red Continuum 5nm 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#: REDCON5-50S

    Available - Ships in 2-4 Days

    $875.00

  4. Astrodon - 50mm OIII 5nm Narrowband Square Filter - Unmounted

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

    Bring out the faint structures In nebulae with the Astrodon OIII Narrowband 31mm 5nm filter. Setting a new bar of performance and durability for imaging and research. ... Learn More
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    (48 States)
    Model#: OIII5-50S

    Available - Ships in 2-4 Days

    $875.00

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

    Astrodon - Narrowband - 50mm Unmounted H-Alpha 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#: HA3-50S

    Available - Ships in 2-4 Days

    $1,250.00

  6. Astrodon 1.25" Mounted Clear UV Blocking (No NIR Blocking) Filter

    Astrodon - 1.25" Mounted 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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    Model#: C2-27R

    Available - Ships in 2-4 Days

    $150.00

  7. Astrodon Photometric Sloan 1.25" Mounted Gen2 u' Edge-Blackened Filter

    Astrodon - Photometric Sloan - 1.25" Mounted Gen2 u' 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#: U'2-27R

    Available - Ships in 2-4 Days

    $200.00

  8. Astrodon - Gen2 E-Series LRGB Set - 1.25" Mounted Set

    Astrodon - Gen2 E-Series LRGB Set - 1.25" Mounted 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-E27R

    In Stock

    $475.00

  9. 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

    Available - Ships in 2-4 Days

    $200.00

  10. Astrodon Photometric UVBRIc - 1.25" Mounted UV Edge Blackened Filter

    Astrodon - Photometric UVBRIc - 1.25" Mounted 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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    Model#: UV-27R

    In Stock

    $200.00

  11. 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 - Ships in 2-4 Days

    $200.00

  12. Astrodon - Photometric UBVRIc - 50mm Unmounted Square Johnson/Cousins B Edge Blackened Filter

    Astrodon - Photometric UBVRIc - 50mm Unmounted Square Johnson/Cousins B 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#: B-50S

    In Stock

    $440.00

  13. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - Johnson-Cousins 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

    In Stock

    $200.00

  14. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - 50mm Unmounted 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-50R

    Available - Ships in 2-4 Days

    $400.00

  15. 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 - Ships in 2-4 Days

    $950.00

  16. Astrodon - Narrowband - 1.25" Mounted Red Continuum 5nm Filter

    Astrodon - Narrowband - 1.25" Mounted 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#: RedCon5-27R

    Available - Ships in 2-4 Days

    $330.00

  17. Astrodon - 50mm OIII 3nm Narrowband Filter - Unmounted

    Astrodon - 50mm OIII 3nm Narrowband Filter - Unmounted

    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#: OIII3-50R

    Available - Ships in 2-4 Days

    $995.00

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

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

    Bring out the faint structures In nebulae with the Astrodon H-Alpha Narrowband 50mm Unmounted Filter. ... Learn More
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    (48 States)
    Model#: HA5-50R

    Available - Ships in 2-4 Days

    $725.00

  19. Astrodon Narrowband 50mm Unmounted NII 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted 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#: NII3-50R

    Available - Ships in 2-4 Days

    $995.00

  20. Astrodon - Narrowband - 50mm Unmounted SII 3 nm Filter

    Astrodon - Narrowband - 50mm Unmounted SII 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#: SII3-50R

    Available - Ships in 2-4 Days

    $995.00

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