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  1. Astrodon Photometric UVBRIc 50mm Unmounted Rc Edge Blackened Square Filter

    Astrodon - Photometric UVBRIc - Johnson-Cousins 50mm Unmounted Rc Edge Blackened Square 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#: RC-50S
    $440.00

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

    Astrodon - Photometric UBVRIc - 50mm Unmounted 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-50R
    $400.00

  3. 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

  4. 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
    $200.00

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

    Astrodon - 50mm 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#: OIII5-50R
    $725.00

  6. 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
    $330.00

  7. 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
    $435.00

  8. 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
    $190.00

  9. 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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    (48 States)
    Model#: g'2-50R
    $400.00

  10. 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
    $490.00

  11. 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
    $320.00

  12. 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

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    Model#: Z'2-27R
    $200.00

  13. Astrodon - Gen2 E-Series LRGB Set - 50mm Unmounted Set

    Astrodon - Gen2 E-Series LRGB Set - 50mm Unmounted Set

    Astrodon 50mm 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
    FREE SHIPPING
    (48 States)
    Model#: LRGB2-E50R
    $950.00

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

  15. Astrodon Photometric UVBRIc - 50x50mm Square Unmounted Johnson/Cousins UV Edge Blackened Filter

    Astrodon - Photometric UVBRIc - 50x50mm Square 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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    FREE SHIPPING
    (48 States)
    Model#: UV-50S
    $440.00

  16. Astrodon - Narrowband - 36mm Unmounted Red Continuum 5nm Filter

    Astrodon - Narrowband - 36mm 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#: RedCon5-36R
    $435.00

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

    Astrodon - Photometric UBVRIc - 50mm Unmounted 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-50R
    $400.00

  18. 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

  19. 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

  20. 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
    FREE SHIPPING
    (48 States)
    Model#: OIII5-50S
    $875.00

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