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Astrodon

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  • Astrodon I-Series 1.25
    Astrodon Astrodon Gen2 I-Series LRGB Tru-Balance Filter Set - 1.25" Threaded Cell - LRGB2-I27R
    $547.00
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  • Astrodon Generation 2 I-Series Tru-Balance LRGB Filter Set - 31 mm Unthreaded Insert
    Astrodon Astrodon Gen2 I-Series LRGB Tru-Balance Filter Set - 31 mm Unthreaded Insert - LRGB2-I31R
    $615.00
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  • Astrodon 36 mm Round Unmounted Gen2 I-Series LRGB Tru-Balance Filters
    Astrodon Astrodon Gen2 I-Series LRGB Tru-Balance Filter Set - 36 mm Round Unmounted - LRGB2-I36R
    $790.00
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  • Astrodon 50 mm Round Unmounted Generation 2 I-Series LRGB Tru-Balance Filter Set
    Astrodon Astrodon Gen2 I-Series LRGB Tru-Balance Filter Set - 49.7 mm Round Unmounted - LRGB2-I50R
    $1,188.00
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  • Astrodon 50 mm Round Unmounted Luminance Gen2 UV/NIR Block Filter
    Astrodon Astrodon Luminance Gen2 UV/NIR Blocking Filter - 49.7 mm Round Unmounted - L2-50R
    $318.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm H-Alpha Narrowband Filter - 49.7 mm Round Unmounted - HA5-50R
    $870.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm SII Narrowband Filter - 49.7 mm Round Unmounted - SII5-50R
    $870.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm OIII Narrowband Filter - 49.7 mm Round Unmounted - OIII5-50R
    $870.00
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  • Astrodon Astrodon Gen2 E-Series LRGB Tru-Balance Filter Set - 49.7 mm Square Unmounted - LRGB2-E50S
    $1,421.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm H-Alpha Narrowband Filter - 49.7 mm Square Unmounted - HA5-50S
    $1,024.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm SII Narrowband Filter - 49.7 mm Square Unmounted - SII5-50S
    $1,024.00
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  • Astrodon 49.7 mm Round Unmounted Clear Filter with UV Blocking Only (No NIR Blocking)
    Astrodon Astrodon Clear Filter with UV-Blocking Only - 49.7 mm Square Unmounted - C2-50S
    $368.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm OIII Narrowband Filter - 49.7 mm Square Unmounted - OIII5-50S
    $1,024.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm Red Continuum Narrowband Filter - 49.7 mm Square Unmounted - REDCON5-50S
    $1,024.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm NII Narrowband Filter - 1.25" Threaded Cell - NII3-27R
    $564.00
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  • Astrodon Generation 2 E-Series 1.25
    Astrodon Astrodon Gen2 E-Series LRGB Tru-Balance Filter Set - 1.25" Threaded Cell - LRGB2-E27R
    $547.00
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  • Astrodon Generation 2 E-Series Tru-Balance LRGB Filter Set - 31 mm Unthreaded Insert
    Astrodon Astrodon Gen2 E-Series LRGB Tru-Balance Filter Set - 31 mm Unthreaded Insert - LRGB2-E31R
    $615.00
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  • Astrodon UVenus UV Imaging Filter
    Astrodon Astrodon UVenus UV Imaging Filter - 1.25" Threaded Cell - UVENUS-27R
    $209.00
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  • Astrodon Astrodon Luminance Gen2 UV/NIR Blocking Filter - 1.25" Threaded Cell - L2-27R
    $184.00
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  • Astrodon Astrodon Clear Filter with UV-Blocking Only - 1.25" Threaded Cell - C2-27R
    $173.00
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  • Astrodon Astrodon 5 nm H-Alpha Narrowband Filter - 1.25" Threaded Cell - HA5-27R
    $380.00
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  • Astrodon Astrodon 3 nm H-Alpha Narrowband Filter - 1.25" Threaded Cell - HA3-27R
    $564.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 5 nm OIII Narrowband Filter - 1.25" Threaded Cell - OIII5-27R
    $380.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm OIII Narrowband Filter - 1.25" Threaded Cell - OIII3-27R
    $564.00
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  • 5 nm SII Narrowband Filter - 1.25
    Astrodon Astrodon 5 nm SII Narrowband Filter - 1.25" Threaded Cell - SII5-27R
    $380.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm SII Narrowband Filter - 1.25" Threaded Cell - SII3-27R
    $564.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm NII Narrowband Filter - 49.7 mm Round Unmounted - NII3-50R
    $1,145.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm NII Narrowband Filter - 49.7 mm Square Unmounted - NII3-50S
    $1,438.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm H-Alpha Narrowband Filter - 49.7 mm Square Unmounted - HA3-50S
    $1,438.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm SII Narrowband Filter - 49.7 mm Square Unmounted - SII3-50S
    $1,438.00
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  • Astrodon Narrowband Filters
    Astrodon Astrodon 3 nm OIII Narrowband Filter - 49.7 mm Square Unmounted - OIII3-50S
    $1,438.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins UV Filter - 49.7 mm Round Unmounted - UV-50R
    $500.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins B Filter - 49.7 mm Round Unmounted - B-50R
    $500.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins V Filter - 49.7 mm Round Unmounted - V-50R
    $500.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins Rc Filter - 49.7 mm Round Unmounted - RC-50R
    $500.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins Ic Filter - 49.7 mm Round Unmounted - IC-50R
    $500.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins UV Filter - 49.7 mm Square Unmounted - UV-50S
    $550.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins B Filter - 49.7 mm Square Unmounted - B-50S
    $550.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins V Filter - 49.7 mm Square Unmounted - V-50S
    $550.00
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  • Astrodon Johnson-Cousins UVBRI Photometric Filters
    Astrodon Astrodon Photometric Johnson-Cousins Rc Filter - 49.7 mm Square Unmounted - RC-50S
    $550.00
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Founded in 2003 by Don Goldman, Astrodon was initially formed in order to distribute his innovative color-balanced RGB filters. These "Tru-Balance" filters would soon be joined by the introduction of maximum performance narrowband filters, as well as the MonsterMOAG Off-Axis Guider. Next, Astrodon acquired Schuler Astro-Imaging UVBRI photometric filters to enter the research market. Prior to being acquired by Astrodon, these filters were constructed of three different colored glasses fused together. Don improved on the design by building the UBVRI filters in the same fashion as all filters made by Astrodon, with a single high quality 3 mm thick fused silica substrate fully coated with hard oxide sputtered coatings. Finally, Astrodon added Sloan (SDSS) filters, featuring the highest throughputs and amazing durability for use during extended research projects.


Astrodon was acquired by Optical Structures (known by most amateur astronomers as FarPoint) in 2018 but all specifications on all Astrodon filters will remain at the same high standards. With Astrodon, you can count on receiving the most durable, high performance, user-friendly filters available anywhere.

High Point Scientific is rated 4.9/5 based on 1347 reviews

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