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Astrodon

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  1. Astrodon - Photometric UBVRIc - 50mm Unmounted Square Johnson/Cousins V Edge Blackened Filter

    Astrodon - Photometric UBVRIc - 50mm Unmounted Square 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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    (48 States)
    Model#: V-50S

    Available - Ships in 2-4 Days

    $440.00

  2. Astrodon 1.25" dia. Unmounted R Filter

    Astrodon - Photometric UVBRIc - 1.25" Mounted 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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    Model#: Ic-27r

    In Stock

    $200.00

  3. 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

  4. 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 - Ships in 2-4 Days

    $440.00

  5. 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

  6. Astrodon - NIR Tricolor - 1.25" NIRL Luminance Round Mounted Filter

    Astrodon - NIR Tricolor - 1.25" NIRL Luminance Round Mounted 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 1.25" round and mounted to fit in your 1.25" filter wheel. Bring out details you have never known existed! NIR filters are a great addition to a traditional narrowband filter set. ... Learn More
    Model#: NIRL-27R

    Available - Ships in 2-4 Days

    $195.00

  7. Astrodon Narrowband 1.25" Mounted SII 5 nm Filter

    Astrodon - Narrowband - 1.25" Mounted SII 5 nm Filter

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    (48 States)
    Model#: SII5-27R

    Available - Ships in 2-4 Days

    $330.00

  8. 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

  9. 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 - Ships in 2-4 Days

    $725.00

  10. 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

  11. 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 - Ships in 2-4 Days

    $385.00

  12. Astrodon 1.25" UVenus Mounted Filter

    Astrodon - 1.25" UVenus Mounted 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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    Model#: UVENUS-27R

    In Stock

    $190.00

  13. 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

  14. Astrodon Narrowband 50mm Unmounted 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

    Available - Ships in 2-4 Days

    $490.00

  15. 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

  16. 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 - Ships in 2-4 Days

    $270.00

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

    Astrodon - 50x50mm Unmounted Clear UV Blocking (No NIR Blocking) Square 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#: C2-50S

    Available - Ships in 2-4 Days

    $320.00

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

    Astrodon - Narrowband - 36mm 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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    (48 States)
    Model#: HA3-36R

    In Stock

    $650.00

  19. 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

  20. 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

    Available - Ships in 2-4 Days

    $995.00

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Like many successful ventures, Astrodon can trace its roots to one individual’s desire to fill a void in the marketplace. Astrophotography hobbyist Don Goldman wanted to capture some of the night sky’s most beautiful offerings in vivid color but was frustrated by the limitations of the RGB filters available in the early 2000s. Goldman became driven to simplify the imaging process so he set out to create high performing, color-balanced RGB filters that would eliminate extra steps in an already meticulous process. In 2003, he began manufacturing his signature LRGB filter design and Astrodon was born. Since then, Astrodon has expanded its offerings to include narrowband filters, research-grade photometric filters and off-axis guiding hardware to enhance the CCD astro-imaging experience. Now a leader in the premium astrophotography filter market, the company’s unwavering commitment to quality is reflected both in its choices — like the use of 100 percent hard-oxide sputtered coatings — and its increasing use at professional facilities like the famous Palomar Observatory.