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  1. Astrodon - Narrowband - 50mm Square H-a 3 nm Filter

    Astrodon - Narrowband - 50mm Square H-a 3 nm Filter

    Narrowband Filters      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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: HA3-50S
    $1,095.00

  2. Astrodon - Narrowband - 50mm Square OIII 3 nm Filter

    Astrodon - Narrowband - 50mm Square OIII 3 nm Filter

    Narrowband Filters      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, ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: OIII3-50S
    $1,095.00

  3. Astrodon - Narrowband - 50mm Square SII 3 nm Filter

    Astrodon - Narrowband - 50mm Square SII 3 nm Filter

    Narrowband FiltersNarrowband (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 ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: SII3-50S
    $1,095.00

  4. Astrodon - NIR Tricolor - 50mm dia. NIRL123 Tri-color Imaging (Set of 4)

    Astrodon - NIR Tricolor - 50mm dia. NIRL123 Tri-color Imaging (Set of 4)

    NIR Tricolor Filters        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 ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: NIRL123-50R
    $1,150.00

  5. Astrodon - Tru-Balance E-Series - 50mm Square CRGB Filter

    Astrodon - Tru-Balance E-Series - 50mm Square CRGB Filter

    What really distinguishes E-Series Tru-Balance filters is their ability to regulate the transition of photons. Within 10%, the RGB color combine weights are about 1:1:1 which means the observor must only take one dark for equal time multiple expores for RGB.

    ...     Learn More
    FREE SHIPPING
    (48 States)
    Model#: CRGB2-E50S
    $1,150.00

  6. Astrodon - Tru-Balance E-Series - 50mm Square LRGB Filter

    Astrodon - Tru-Balance E-Series - 50mm Square LRGB Filter

    TRU-BALANCE FILTERSSIMPLIFY YOUR IMAGINGGreat Filters Just Got Better - Generation 2 Now Shipping!        Astrodon Tru-Balance RGB filters have revolutionized CCD imaging ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: LRGB2-E50S
    $1,150.00

  7. Astrodon - Tru-Balance E-Series - 65mm Square LRGB Filters for SBIG STX

    Astrodon - Tru-Balance E-Series - 65mm Square LRGB Filters for SBIG STX

    TRU-BALANCE FILTERS SIMPLIFY YOUR IMAGINGGreat Filters Just Got Better - Generation 2 Now Shipping!        Astrodon Tru-Balance RGB filters have revolutionized CCD imaging ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: LRGB2_E65S
    $1,895.00

  8. Baader Planetarium - D-ERF Energy rejection filter 135mm with IR-Cut dielectric coating

    Baader Planetarium - D-ERF Energy rejection filter 135mm with IR-Cut dielectric coating

    Baader Planetarium D-ERF Energy Rejection Filter, 135mm with IR-Cut Dielectric CoatingBaader planetarium has introduced a new evolution in their premium energy rejection filters, from 70mm up to 180mm! These filters incorporate a new all-dielectric IR re ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: DERF-135
    $1,172.00

  9. Baader Planetarium - D-ERF Energy rejection filter 160mm with IR-Cut dielectric coating

    Baader Planetarium - D-ERF Energy rejection filter 160mm with IR-Cut dielectric coating

    Baader Planetarium D-ERF Energy Rejection Filter, 160mm with IR-Cut Dielectric CoatingBaader planetarium has introduced a new evolution in their premium energy rejection filters, from 70mm up to 180mm! These filters incorporate a new all-dielectric IR re ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: DERF-160
    $1,497.00

  10. new bf30

    Coronado - 30mm Blocking Filter

    The 30mm Blocking Filter is a 2" straight through design and comes with a 1.25" Zero Length reducer

    ...     Learn More
    Model#: BF30
    $1,599.00

  11. Coronado - Retro fit module for SM60P

    Coronado - Retro fit module for SM60P

    Fully integrated Ha telescope 60mm aperture ... Learn More
    Model#: SM60DB
    $1,790.00

  12. Coronado - Retro fit module for SM60T

    Coronado - Retro fit module for SM60T

    Coronado Double Stacking Filters for SolarMax Telescopes feature a narrowband element front unit filter and a T-Max de-tuning device. The Double Stack Filter by Coronado is useful for your solarscope as it will give you a better view of an image ... Learn More
    Model#: SM60TDB
    $1,790.00

  13. Coronado - SolarMax 40 Ha Filter with BF10 and TMax Tuner

    Coronado - SolarMax 40 Ha Filter with BF10 and TMax Tuner

    40mm aperture narrowband Ha filter with TMax tuner and 10 mm blocking filter ... Learn More
    Model#: SM40_10
    $1,450.00

  14. Coronado - SolarMax 40 Ha Filter with BF15 and TMax Tuner

    Coronado - SolarMax 40 Ha Filter with BF15 and TMax Tuner

    40mm aperture narrowband Ha filter with TMax tuner and 15 mm blocking filter ... Learn More
    Model#: SM40_15
    $1,725.00

  15. Coronado - SolarMax II 40mm Filter with RichView™ Tuning with 10mm Blocking Filter

    Coronado - SolarMax II 40mm Filter with RichView™ Tuning with 10mm Blocking Filter

    Coronado by Meade SolarMax II Solar Filter set with RichView tuning system. Includes 40mm diameter primary H-Alpha etalon filter with sub 0.7 angstrom bandwidth and Blocking Filter ... Learn More
    Model#: SMF40-10
    $1,099.00

  16. Coronado - SolarMax II 40mm Filter with RichView™ Tuning with 15mm Blocking Filter

    Coronado - SolarMax II 40mm Filter with RichView™ Tuning with 15mm Blocking Filter

    Coronado by Meade SolarMax II Solar Filter set with RichView tuning system. Includes 40mm diameter primary H-Alpha etalon filter with sub 0.7 angstrom bandwidth and Blocking Filter ... Learn More
    Model#: SMF40-15
    $1,299.00

  17. Coronado - SolarMax II 60mm Filter with RichView™ Tuning with 10mm Blocking Filter

    Coronado - SolarMax II 60mm Filter with RichView™ Tuning with 10mm Blocking Filter

    Coronado - SMF60-BF10

    Coronado by Meade SolarMax II Solar Filter set with RichView tuning system. Includes 60mm diameter primary H-Alpha etalon filter with sub 0.7 angstrom bandwidth and 10mm Blocking Filter. 

    ...     Learn More
    Model#: SMF60-10
    $1,399.00

  18. Coronado - SolarMax II 60mm Filter with RichView™ Tuning with 15mm Blocking Filter

    Coronado - SolarMax II 60mm Filter with RichView™ Tuning with 15mm Blocking Filter

    Coronado by Meade SolarMax II Solar Filter set with RichView tuning system. Includes 60mm diameter primary H-Alpha etalon filter with sub 0.7 angstrom bandwidth and Blocking Filter.

    ...     Learn More
    Model#: SMF60-15
    $1,599.00

  19. CFW-4-5

    FLI - 5 position CFW for ProLine (50mm square filters)

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: CFW-4-5
    $1,495.00

  20. CFW-5-7

    FLI - 7 position CFW for ProLine (50mm square filters)

    ... Learn More
    FREE SHIPPING
    (48 States)
    Model#: CFW-5-7
    $1,695.00

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