Baader Planetarium 65x65mm 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter
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Baader Planetarium 65x65mm Square 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter, Unmounted

SKU: AAFHALNUSQ65 MFR: FHALNU-SQ65
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Key Features

  • Capture stunning H-alpha images with this 65x65mm narrowband filter, perfect for CCD imaging.
  • Experience exceptional contrast with the 3.5nm ultra-narrowband filter, enhancing deep sky views.
  • Minimize light pollution and maximize detail using this specialized H-alpha CCD imaging filter.
  • Achieve superior transmission rate at the H-alpha wavelength for breathtaking astrophotography.
  • This unmounted square filter offers versatile use in custom filter wheel setups for telescopes.
  • Enjoy durable, dielectrically coated optics ensuring optimal filter quality and long-term performance.
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Special Order?Estimated to Ship: 08/16/2025
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Review Summary

2019-05-29T16:43:43

Rated 5 out of 5

The perfect mounting cell for eclipse photographers

AstroSolar film is the standard for white light solar filters. This mounting cell has two great advantages for eclipse photographers. The wide flange shades your camera avoiding overheating. The external 3 rubber bumper attachment is easy to remove and replace quickly without disturbing your aim. This is a great advantage for totality in a total solar eclipse. Highly recommended

Robert P.

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Baader Planetarium Filter Specifications

  • Transmission Range

    H-alpha

  • Filter Thickness

    3mm (without Cell)

  • Half Bandwidth

    3.5nm

  • Central Wavelength

    656.3nm

  • AR-coating

    Dielectrically coated, plane optically polished

  • Special Functions

    Enforced Narrowband

  • Filter Size

    65 x 65mm (2.56 x 2.56")

  • Filter Usage

    CCD, Deep Sky, H-alpha

  • Filter Mounted

    Unmounted

  • Type of Filter

    Narrowband

  • Filter Shape

    Square

  • Weight

    0.073kg (0.16 lbs)

  • UPC Code

    4047825047601

About Baader Planetarium Filter

FEATURED REVIEWS

The perfect mounting cell for eclipse photographers

By Robert P.

AstroSolar film is the standard for white light solar filters. This mounting cell has two great advantages for eclipse photographers. The wide flange shades your camera avoiding overheating. The external 3 rubber bumper attachment is easy to remove and replace quickly without disturbing your aim. This is a great advantage for totality in a total solar eclipse. Highly recommended

• Precision grade enforced H-alpha filter for f/10 to f/3.5 optical systems
• Opens up the extremely narrow 3.5nm H-alpha world
• This enforced contrast results in even fainter stars, providing more signal of faintest nebulae detail
• Manufacturing such ultra-narrow filter does require extreme coating homogeneity and very high CWL precision, which these filters are designed for. CWL= Center-wavelength / FWHM= full width half maximum

Warranty Information

This product has a limited warranty of 24 months for parts and 24 months for labor.

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Key Features

  • Capture stunning H-alpha images with this 65x65mm narrowband filter, perfect for CCD imaging.
  • Experience exceptional contrast with the 3.5nm ultra-narrowband filter, enhancing deep sky views.
  • Minimize light pollution and maximize detail using this specialized H-alpha CCD imaging filter.
  • Achieve superior transmission rate at the H-alpha wavelength for breathtaking astrophotography.
  • This unmounted square filter offers versatile use in custom filter wheel setups for telescopes.
  • Enjoy durable, dielectrically coated optics ensuring optimal filter quality and long-term performance.

What's in the box:

  • Baader Planetarium 65x65mm Square 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter
  • Stackable Filter Box
  • Baader Planetarium 2 Year Limited Warranty