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  1. TO - 9 - 10 " H-Alpha Filter CENTER-AXIS

    TO - 9-10 " H-Alpha Filter CENTER-AXIS

    The H-Alpha (Hydrogen-Alpha) filter allows safe observation of the entire solar disc, providing .... ... Learn More
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    (48 States)
    Model#: TO9-10HACA
    $929.00

  2. 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.

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    (48 States)
    Model#: CRGB2-E50S
    $1,150.00

  3. Orion - 2" Extra Narrowband Filter Set

    Orion - 2" Extra Narrowband Filter Set

    These specialized astrophotography filters pass select wavelengths and essentially block all other wavelengths of light, including light pollution, so you can capture images in less than ideal conditions.

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    Model#: 25545
    $969.95

  4. Astrodon - Narrowband - 50mm Unmounted OIII 3nm Filter

    Astrodon - Narrowband - 50mm Unmounted OIII 3nm 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#: SII3-50R
    $995.00

  5. SBIG - Ten position "stand alone" filter wheel for ST-402/1603/3200/8300 and non-SBIG cameras - will vignette 8300 in f/6 or faster systems

    SBIG - Ten position "stand alone" filter wheel for ST-402/1603/3200/8300 and non-SBIG cameras - will vignette 8300 in f/6 or faster systems

    The new CFW10 is a ten-position filter wheel designed for the USB version of our ST camera series or any camera where a serial port is available for controlling the wheel ... Learn More
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    (48 States)
    Model#: CFW10-SA
    $995.00

  6. B1800s2

    Lunt - Blocking Filter B1800s 2 " - in extension tube with T2 and 2 " connection

    2.00" Lunt Solar Systems B1800 Blocking Filter in extension tube with T2 and 2" connectionFor best performance, be sure to pair your Lunt Solar Systems h-Alpha filter with the proper sized Lunt blocking filter ... Learn More
    Model#: B1800s2
    $998.00

  7. Lunt  -  Calcium Module (Ca-K) with B1200 Blocking Filter  -  in Straight Thru 2" Tube with T2 & 2" connection

    Lunt - Calcium Module (Ca-K) with B1200 Blocking Filter - in Straight Thru 2" Tube with T2 & 2" connection

    Calcium K (Ca-K) Telescopes and Filters are used to study the

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    Model#: LS12CaKMDs2
    $1,018.00

  8. Chroma filters

    Chroma Technology - 36mm LRGB and Ha/8-36 Set - Unmounted

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    (48 States)
    Model#: HaLRGB-36
    $925.00

  9. Chroma filters

    Chroma Technology - 50mm x 50mm LRGB Filter Set - Square

    Extremely durable coatings withstand humidity changes, extreme temperature fluxes and remain spectrally accurate in CWL and band pass adherence.

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    (48 States)
    Model#: LRGB-50S
    $1,085.00

  10. Astrodon - 50mm Unmounted Gen2 E-Series LRGB Filters (set of 4)

    Astrodon - 50mm Unmounted Gen2 E-Series LRGB Filters (set of 4)

    Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to ease-of-use, high optical throughput and great resulting color for galaxies, star clusters and nebulae.  There are two varieties of Tru-Balance filters - E-Series and I-Series.

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    (48 States)
    Model#: LRGB2-E50R
    $950.00

  11. Lunt - Ca-K Module with B1800 Blocking Filter in Extension Tube for 2" Focuser

    Lunt - Ca-K Module with B1800 Blocking Filter in Extension Tube for 2" Focuser

    This Calcium-K module transforms your normal astronomical telescope into a ... Learn More
    Model#: LS18CaKMDs2
    $1,194.00

  12. 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

  13. SBIG Filter Wheel for 8300 for 36mm filters with Baader 36mm LRGB Filters

    SBIG - Filter Wheel for 8300 for 36mm filters with Baader 36mm LRGB Filters

    Since the KAF-8300 CCD sensor usually cannot accommodate 1.25" filters due to its size especially at shorter focal lengths for imaging deep sky.

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    (48 States)
    Model#: FW5-8300_B36LRGB
    $995.00

  14. Lunt - Blocking Filter B1800 in 2" Diagonal with T2 Connection

    Lunt - Blocking Filter B1800 in 2" Diagonal with T2 Connection

    This 2.00" Lunt Solar Systems B1800 Blocking Filter is housed in a star diagonal with a T2 connection.For best performance, be sure to pair your Lunt Solar Systems h-Alpha filter with the proper sized Lunt blocking filter

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    Model#: B1800d2
    $998.00

  15. DayStar Filters Energy Rejection Filter 165mm Glass, Cell and Cap

    DayStar Filters - Energy Rejection Filter - 165mm Glass, Cell and Cap

    The DayStar Energy Rejection Filters come in handy when the observer needs to reduce heat load on the filters by absorbing UV wavelengths.

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    (48 States)
    Model#: ERF-165
    $1,000.00

  16. DayStar Filters Energy Rejection Filter 150mm Glass, Cell and Cap

    DayStar Filters - Energy Rejection Filter - 150mm Glass, Cell and Cap

    The DayStar Energy Rejection Filters come in handy when the observer needs to reduce heat load on the filters by absorbing UV wavelengths.

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    (48 States)
    Model#: ERF-150
    $900.00

  17. Astrodon - Narrowband - 65mm Unmounted H-Alpha 5 nm Square Filter

    Astrodon - Narrowband - 65mm Unmounted H-Alpha 5 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#: HA5-65S
    $1,050.00

  18. Baader Planetarium - 65mm  Square LRGB Filters - UV/IR Cut L-Filter

    Baader Planetarium - 65mm Square LRGB Filters - UV/IR Cut L-Filter

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    (48 States)
    Model#: FLRGB-SQ65
    $949.00

  19. 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
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    (48 States)
    Model#: DERF-135
    $1,172.00

  20. Baader Planetarium - Set 50.8mm for InterLine-CCD, consisting of 4 Filters: H-alpha 35nm, H-beta, O III, S-II

    Baader Planetarium - Set 50.8mm for InterLine-CCD, consisting of 4 Filters: H-alpha 35nm, H-beta, O III, S-II

    CCD imagers will find Baader's Premium Narrowband CCD passfilters to deliver the absolute highest contrast deep sky images in H-Alpha, H-Beta, Oxygen III, and Sulfur-II, with the shortest exposures possible ... Learn More
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    (48 States)
    Model#: FNSET4-RD50
    $975.00

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