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1.25" Filters

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  1. 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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    (48 States)
    Model#: CU-UBVRI125-SET
    $990.00

  2. Baader Planetarium Set of 5 Photometric UBVRI Filters 1.25" (4mm Glass Thickness, Optically Polished)
  3. Optolong UBVRI Filter Set - 1.25" Mounted

    Optolong - UBVRI Filter Set - 1.25" Mounted

    This photometric UBVRI filter set includes five 1.25" mounted filters: ultraviolet (U), blue (B), visual (V), red (R), and infrared (I). 

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    Model#: UBVRI-125
    $685.00

  4. 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

  5. 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

  6. Astrodon - Narrowband - 1.25" Mounted H-Alpha 3 nm Filter

    Astrodon - Narrowband - 1.25" Mounted 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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    Model#: HA3-27R
    $490.00

  7. Astrodon Narrowband 50mm Unmounted NII 3 nm Filter

    Astrodon - Narrowband - 1.25" Mounted NII 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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    Model#: NII3-27R
    $490.00

  8. Astrodon Mounted LRGB Gen2 I-Series 1.25" Filter Set

    Astrodon - Mounted LRGB Gen2 I-Series 1.25" Filter Set

    I-Series filters are designed to approximately equalize the flux of  Interline CCD detectors (formerly Kodak), including compensation for the solar photon flux.

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    Model#: LRGB2-I27R
    $475.00

  9. Astrodon - Gen2 E-Series LRGB Set - 1.25" Mounted Set

    Astrodon - Gen2 E-Series LRGB Set - 1.25" Mounted Set

    Astrodon 31mm Gen2 LRGB E-series filters are the pinnacle of high performance CCD filters. The E-Series Gen2 filters were designed for cameras containing the full-frame KAF8300, KAF3200, KAF6303, KAF16200, KAF16803 sensors, as well as most Sony and back-thinned sensors. ... Learn More
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    (48 States)
    Model#: LRGB2-E27R
    $475.00

  10. Vernonscope Ten 1.25" Filter Set

    Vernonscope - Ten 1.25" Filter Set

    This Vernonscope eyepiece set includes ten 1.25" visual filters that are compatible with the Brandon Ocular and Dakin Barlow eyepieces and include numbers on the surface that match Kodak Wratten.

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    Model#: 27200
    $369.00

  11. Astrodon - Narrowband - 1.25" Mounted Red Continuum 5nm Filter

    Astrodon - Narrowband - 1.25" Mounted Red Continuum 5nm 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, 501 nm), sulfur (SII, 672nm) and others.

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    Model#: RedCon5-27R
    $330.00

  12. Astrodon Narrowband 1.25" Mounted SII 5 nm Filter

    Astrodon - Narrowband - 1.25" Mounted SII 5 nm Filter

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    Model#: SII5-27R
    $330.00

  13. Astrodon - 1.25" H-Alpha 5nm Narrowband Filter - Mounted

    Astrodon - 1.25" H-Alpha 5nm Narrowband Filter - Mounted

    Bring out the faint structures In nebulae with the Astrodon H-Alpha Narrowband 1.25" 5nm filter. ... Learn More
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    (48 States)
    Model#: HA5-27R
    $330.00

  14. Baader Planetarium - U Filter (Venus and Ultraviolet) - 1.25"

    Baader Planetarium - U Filter (Venus and Ultraviolet) - 1.25"

    Another unique and pioneering filter from Baader Planetarium. For the first time, amateurs can now record cloud structures on Venus. The Baader Venus Filter enables amateurs to successfully image in the deep UV, a spectral region normally inaccessible

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    Model#: FUV-1
    $296.00

  15. Celestron LRGB Imaging Filter Set

    Celestron - LRGB Imaging Filter Set

    Take color images of the night sky with your Skyris monochrome CCD camera, a simple filter wheel, and this four-piece LRGB filter set!

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    (48 States)
    Model#: CEL-95517
    $279.95

  16. 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

  17. Optolong LRGB CCD Filter Set - 1.25" Mounted

    Optolong - LRGB CCD Filter Set - 1.25" Mounted

    The Optolong LRGB Filter Set includes four 1.25" mounted imaging filters, including Red, Green, Blue, and Luminance. They're suitable for de-bayered monochrome CCD and CMOS cameras, and function remarkably for both planetary and deep sky imaging. Learn More

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    (48 States)
    Model#: LRGB-125
    $249.00

  18. Baader Planetarium - f/2 Highspeed-Filter S-II 1.25" (with LPFC)

    Baader Planetarium - f/2 Highspeed-Filter S-II 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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    (48 States)
    Model#: FSIIHS-1
    $219.00

  19. 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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    (48 States)
    Model#: FOIIIHS-1
    $213.00

  20. Astrodon - Photometric UBVRIc - 1.25" Mounted Johnson/Cousins B Edge Blackened Filter

    Astrodon - Photometric UBVRIc - 1.25" Mounted Johnson/Cousins B Edge Blackened Filter

    UVBRI filters have been the standard for photometric measurements for decades.  They have evolved over time as technology changed.

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    Model#: B-27R
    $200.00

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