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1.25" Filters

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  1. Custom Scientific "V" Research Grade Filter 1.25" Round Mounted

    Custom Scientific - "V" Research Grade Filter - 1.25" Round Mounted

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

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    Model#: CU-125V
    $175.00

  2. Custom Scientific - "R" Research Grade Filter - 1.25" Round Mounted

    Custom Scientific - "R" Research Grade Filter - 1.25" Round Mounted

    With over 20 years in the business, Custom Scientific UBVRI filters are popular photometric tools that have built in Infrared blocking for more efficient and higher quality CCD imaging.

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    Model#: CU-125R
    $175.00

  3. Custom Scientific H-Alpha 656.3/4.5 nm Filter 1.25" Round Mounted

    Custom Scientific - H-Alpha 656.3/4.5 nm Filter - 1.25" Round Mounted

    The Custom Scientific H-Alpha 656.3/4.5 nanometer filter is a great accessory for imaging emission nebulae which emit large amounts of the H-Alpha spectral line at a 4.5 nanometer bandpass due to excited hydrogen atoms.

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    Model#: CU-HA45NM-125
    $600.00

  4. Custom Scientific Luminance (IR-Blocked Clear) Filter 1.25" Round Mounted

    Custom Scientific - Luminance (IR-Blocked Clear) Filter - 1.25" Round Mounted

    The Custom Scientific Luminance Clear assists in CCD imaging because it preserves the visual spectral wavelengths while suppressing the extra Infrared wavelengths picked up by CCD sensors that the human eye can't detect.

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    Model#: CU-LUM-125
    $95.00

  5. Custom Scientific UBVRI 1.25" Mounted Round Filter Set

    Custom Scientific - UBVRI 1.25" Mounted Round Filter Set

    Custom Scientific UBVRI filters have been used in institutions and observatories around the world such as Kitt Peak, Mauna Kea, and the CTIO/Chile.

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    Model#: CU-UBVRI125-SET
    $875.00

  6. Baader Planetarium - f/2 Highspeed-Filter H-Alpha 1.25" (with LPFC)

    Baader Planetarium - f/2 Highspeed-Filter H-Alpha 1.25" (with LPFC)

    Baader's New f/2 Highspeed Narrowband Filters and Filtersets (1¼" and 2", H-alpha / O-III / S-II) are designed especially for the delicate requirements of extremely fast astrograph optics, such as Hyperstar, RASA, and ultra-fast instruments from TEC/AP/ASA/etc.

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    Model#: FHALHS-1
    $257.00

  7. Baader Planetium f/2 Highspeed-Filter Set 1.25", consisting of H-α, O-III, S-II

    Baader Planetium - f/2 Highspeed-Filter Set 1.25", consisting of H-α, O-III, S-II

    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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    Model#: FHSS-1
    $649.00

  8. Baader Planetarium - f/2 Highspeed-Filter O-III 1.25" (with LPFC)

    Baader Planetarium - f/2 Highspeed-Filter O-III 1.25" (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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    Model#: FOIIIHS-1
    $213.00

  9. Baader Planetarium - 1.25" Polarization Filter - Double

    Baader Planetarium - 1.25" Polarization Filter - Double

    The Baader Planetarium 1.25" Polarization filter can be threaded directly into an eyepiece, thereby making the switch from 1.25" eyepieces easy without removing the filter and maintaining a close distance between the eyepiece and filter.

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    Model#: FPOL-1D
    $97.00

  10. Baader Planetarium 1.25" Polarization Filter - Single

    Baader Planetarium - 1.25" Polarization Filter - Single

    The Baader Planetarium 1.25" Polarization filter can be threaded directly into an eyepiece, thereby making the switch from 1.25" eyepieces easy without removing the filter and maintaining a close distance between the eyepiece and filter.

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    Model#: FPOL-1
    $54.00

  11. Astronomik - Planet IR Pro 807 Filter - 1.25" Round Mounted

    Astronomik - Planet IR Pro 807 Filter - 1.25" Round Mounted

    The Astronomik ProPlanet 807 filter is a deal addition to the Astronomik  ProPlanet 742 for imaging the moon and planets, with telescopes larger  then 10" (250mm) when the seeing is poor.

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    Model#: P807-1
    $45.95

  12. Astronomik - IR Blocking Filter for CCD - T Threads

    Astronomik - IR Blocking Filter for CCD - T Threads

    The Astronomik 1.25" IR Blocking Filter is an infrared-blocking filter for digital photography.

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    Model#: IR-T
    $65.95

  13. Astronomik - UHC Visual Filter - 1.25" Round Mounted

    Astronomik - UHC Visual Filter - 1.25" Round Mounted

    The Astronomik UHC filter is for visual deep-sky observation.

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    Model#: UHC-1
    $99.95

  14. Astronomik - OIII Filter - 1.25" Round Mounted

    Astronomik - OIII Filter - 1.25" Round Mounted

    From the start, the Astronomik OIII filter has been very specifically designed for the visual observation of gaseous and planetary nebulae.

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    Model#: OIII-1
    $99.95

  15. Astronomik - UHC-E - Economy UHC Filter - 1.25" Round Mounted

    Astronomik - UHC-E - Economy UHC Filter - 1.25" Round Mounted

    The Astronomik UHC-E filter is THE budget filter for deep-sky observation of emission nebulae and comets under light polluted skies.

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    Model#: UHCE-1
    $65.95

  16. Astronomik - Luminance (IR/UV Blocking) Filter - 1.25"

    Astronomik - Luminance (IR/UV Blocking) Filter - 1.25"

    The Astronomik UV and IR cut Filter is great for for digital photography!

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    Model#: L-1
    $49.95

  17. Astronomik - MC Clear Multicoated Filter - 1.25" Round Mounted

    Astronomik - MC Clear Multicoated Filter - 1.25" Round Mounted

    This Multicoated (MC) glass serves as dust protector or to keep your system parfocal with other Astronomik filters.

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    Model#: C-1
    $35.95

  18. Astronomik OIII 12nm CCD Filter 1.25" Round Mounted

    Astronomik - OIII 12nm CCD Filter - 1.25" Round Mounted

    The Astronomik OIII CCD filter is a narrow band emission-line-filter for CCD photography.

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    Model#: OIIICCD-1
    $129.95

  19. Astronomik - SII 12nm CCD Filter - 1.25" Round Mounted

    Astronomik - SII 12nm CCD Filter - 1.25" Round Mounted

    The Astronomik SII-CCD filter is a narrow-band-filter for CCD photography.

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    Model#: SII-1
    $129.95

  20. Astronomik - CLS Light Pollution Filter - CCD 1.25"

    Astronomik - CLS Light Pollution Filter - CCD 1.25"

    The Astronomik CLS CCD is suitable under light-polluted skies for DSLR Cameras, which have been remodeled for astronomical use.

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    Model#: CLSCCD-1
    $99.95

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