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  1. 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

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

    Astrodon - 36mm OIII 5nm Narrowband 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#: OIII5-36R
    $435.00

  3. 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
    $335.00

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

    Astrodon - Photometric Sloan - 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

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

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

    Bring out the faint structures In nebulae with the Astrodon H-Alpha Narrowband 1.25" 5nm filter. ... Learn More
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    (48 States)
    Model#: HA5-27R
    $330.00

  6. 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
    $875.00

  7. 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
    $150.00

  8. 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

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: g'2-50S
    $440.00

  9. 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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    (48 States)
    Model#: HA3-50R
    $995.00

  10. Astrodon - NIR Tricolor - 50mm NIRL Luminance Square Filter

    Astrodon - NIR Tricolor - 50mm NIRL Luminance Square 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-50S
    $525.00

  11. 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
    $475.00

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

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

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

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: u'2-50R
    $400.00

  13. Astrodon Mounted LRGB Gen2 I-Series 1.25" Filter Set

    Astrodon - Mounted LRGB Gen2 I-Series 1.25" Filter Set

    I-Series filters are designed to approximately equalize the flux of  Interline CCD detectors (formerly Kodak), including compensation for the solar photon flux.

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    (48 States)
    Model#: LRGB2-I27R
    $475.00

  14. 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
    $200.00

  15. Astrodon Photometric Sloan 50mm Unmounted Gen2 r' Edge Blackened Filter

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

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

    ...
    Learn More
    FREE SHIPPING
    (48 States)
    Model#: r'2-50R
    $400.00

  16. Astrodon - 31mm SII 3nm Narrowband Filter - Unmounted

    Astrodon - 31mm SII 3nm Narrowband Filter - Unmounted

    Bring out the faint structures In nebulae with the Astrodon SII 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#: SII3-31R
    $490.00

  17. 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
    $440.00

  18. Astrodon - Photometric Sloan - 1.25" Mounted Gen2 z' Edge Blackened Filter

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

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

    ...
    Learn More
    Model#: Z'2-27R
    $200.00

  19. 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
    FREE SHIPPING
    (48 States)
    Model#: OIII5-27R
    $330.00

  20. 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
    $400.00

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