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2" Filters

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  1. Astronomik 6 nm OIII MFR Narrowband Filter - 2" Mounted

    Astronomik - 6nm OIII MFR Narrowband Filter - 2" Mounted

    The OIII line (501 nm) is located in the blue-green portion of the spectrum, making them very suitable for observing most planetary nebulae and supernovae remnants and other objects with doubly ionized oxygen.

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    (48 States)
    Model#: OIIICCD6-2

    Available - Ships in 2-4 Days

    $449.95

  2. Astronomik - Dark Filter - 2"

    Astronomik - Dark Filter - 2"

    Do you have a CCD camera without a mechanical shutter and would like to do dark frames without continually monitoring your equipment?

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    Model#: DARK-2

    Available - Ships in 2-4 Days

    $49.95

  3. Astronomik - ProPlanet 642 BP IR-Pass Filter - 2"

    Astronomik - ProPlanet 642 BP IR-Pass Filter - 2"

    your camera, the Astronomik ProPlanet 642 BP is a great tool either for daylight IR-imaging with your digital camera, or it will reduce seeing effects and enhance contrast when used for .... ... Learn More
    Model#: P642-2

    Available - Ships in 2-4 Days

    $139.95

  4. AstroOptic - 2" CLS Filter

    AstroOptic - 2" CLS Filter

    Light pollution CLS Filters are designed to minimize the affects of light pollution by removing common nanometers and wavelengths found in artificial street lights in the city.

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    Model#: Q1-CLS2-01

    In Stock

    Regular Price: $116.99

    Special Price: $89.95

  5. Astro Optic 2" O-III Filter

    AstroOptic - 2" O-III Filter

    Oxygen III or OIII filters are mainly designed for viewing planetary nebulae that normally have extremely narrow pass bands in the oxygen spectral lines

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    Model#: Q1-OIII2-01

    In Stock

    Regular Price: $115.99

    Special Price: $89.99

  6. Astro Optic 2" UHC Filter

    AstroOptic - 2" UHC Filter

    The UHC, otherwise known as the Ultra High Contrast Filter is designed for viewing nebulae under a dark sky by filtering out certain wavelengths

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    Model#: Q1-UHC2-01

    In Stock

    Regular Price: $116.99

    Special Price: $89.99

  7. Baader Planetarium - 	Neutral Density 1.8 Filter - 2"

    Baader Planetarium - Neutral Density 1.8 Filter - 2"

    The Baader Planetarium Neutral Density 2" 1.8 Filter is threaded for 48mm metric threads and has a 1.6% transmission rate, making it remarkable for observing the moon with large aperture optical tubes. NOTE: Use the filter with the AstroSolar Density 3.8 Film for safe solar observing.

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    Model#: BPND18

    Available - Ships in 2-4 Days

    $58.00

  8. Baader Planetarium 2" Multicoated Neutral Density Filter ND 0.6

    Baader Planetarium - 2" Multicoated Neutral Density Filter - ND 0.6

    The Baader Planetarium Neutral Density Filter 0.6. helps reduce light from bright objects. It is mounted in a 2" filter cell (also available as a 1.25" version SOLD SEPARATELY)

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    Model#: FND0-2

    Available - Ships in 2-4 Days

    $64.00

  9. Baader Planetarium 2" Multicoated Neutral Density Filter - ND 0.9

    Baader Planetarium - 2" Multicoated Neutral Density Filter - ND 0.9

    The Baader Planetarium Neutral Density Filter 0.9 helps reduce light from bright objects. It is mounted in a 2" filter cell (also available as a 1.25" version SOLD SEPARATELY)

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    Model#: FND1-2

    Available - Ships in 2-4 Days

    $64.00

  10. Baader Planetarium 2" Multicoated Neutral Density Filter - ND 1.8

    Baader Planetarium - 2" Multicoated Neutral Density Filter - ND 1.8

    The Baader Planetarium Neutral Density Filter 1.8 helps reduce light from bright objects. It is mounted in a 2" filter cell (also available as a 1.25" version SOLD SEPARATELY)

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    Model#: FND2-2

    Available - Ships in 2-4 Days

    $68.00

  11. Baader Planetarium 2" Multicoated Neutral Density Filter - ND 0.9

    Baader Planetarium - 2" Multicoated Neutral Density Filter - ND 3.0

    The Baader Planetarium Neutral Density Filter 3.0 helps reduce light from bright objects. It is mounted in a 2" filter cell (also available as a 1.25" version SOLD SEPARATELY)

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    Model#: FND3-2

    Available - Ships in 2-4 Days

    $68.00

  12. Baader Planetarium 2" Polarization Filter - Double

    Baader Planetarium - 2" Polarization Filter - Double

    The Baader 2" Polarizer can attacha a T2-15 adapter, enabling the use of 1.25" eyepiece without removing the filter while keeping the eyepiece and filter position close.

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    Model#: FPOL-2D

    Available - Ships in 2-4 Days

    $137.00

  13. Baader Planetarium 2" Polarization Filter - Single

    Baader Planetarium - 2" Polarization Filter - Single

    The Baader 2" Polarizer can attacha a T2-15 adapter, enabling the use of 1.25" eyepiece without removing the filter while keeping the eyepiece and filter position close.

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    Model#: FPOL-2

    Available - Ships in 2-4 Days

    $83.00

  14. Baader Planetarium Color Filters - 1.25"

    Baader Planetarium - Color Filters - 2"

    These color filters provide the highest levels of image brightness and freedom from scattered light, combined with uncompromising image sharpness at the high magnifications required to observe delicate planetary details.

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    Model#: BPCF2

    Available - Ships in 2-4 Days

    $284.00

  15. FCB-2

    Baader Planetarium - Contrast Booster 2" Filter

    Much more than a simple minus-violet filter. Based on the popular Baader Moon&Skyglow filter, the Baader Contrast-Booster takes contrast enhancement and skyglow reduction to the maximum level possible from a filter

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    Model#: FCB-2

    In Stock

    $123.00

  16. Baader Planetarium - Contrast-Booster Filter - 2"

    Baader Planetarium - Contrast-Booster Filter - 2"

    The Baader Planetarium 2" Contrast Booster Filter is a remarkable accessory for all refractive optical systems!

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    Model#: BPCB2

    Available - Ships in 2-4 Days

    $115.00

  17. Baader Planetarium f/2 Highspeed-Filter S-II 2" (with LPFC)

    Baader Planetarium - f/2 Highspeed-Filter S-II 2" (with LPFC)

    Baader’s new ‘High Speed’ Narrowband CCD Filters come in both 1.25” and 2” diameter mounted sizes, in H-alpha, O-III, and S-II, but with an extra twist when compared to their normal filters.

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    (48 States)
    Model#: FSIIHS-2

    Available - Ships in 2-4 Days

    $352.00

  18. Baader Planetarium Narrowband Enforced 3.5nm H-Alpha Filter, 2" (with LPFC)

    Baader Planetarium - Narrowband Enforced 3.5nm H-Alpha Filter, 2" (with LPFC)

    Open up the extremely narrow 3.5nm H-alpha world.  This enforced contrast results in even fainter stars, and providing more signal of the faintest nebulae detail.

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    Model#: FHALNE-2

    Available - Ships in 2-4 Days

    $537.00

  19. Baader Planetarium - Neodymium (Moonglow and Skyglow) Filter - 2"

    Baader Planetarium - Neodymium (Moonglow and Skyglow) Filter - 2"

    The Baader Planetarium Neodymium Filter was intended to transmit the most amount of incoming light possible while suppressing skyglow caused by artificial lighting and background glow when Moon is above horizon.

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    Model#: BPMS2

    Available - Ships in 2-4 Days

    $119.00

  20. Baader Planetarium Polarizing Filter - 2"

    Baader Planetarium - Polarizing Filter - 2"

    For observers who enjoy lunar viewing, the Baader Planetarium Polarizing Filter is a perfect option. It provides variable neutral density as it is rotated to accommodate different lunar stages.

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    Model#: BPPOL2

    Available - Ships in 2-4 Days

    $87.00

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