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Alpine Astronomical Baader 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter (65mm Square, Unmounted)

Alpine Astronomical Baader 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter (65mm Square, Unmounted)

B&H # ALFHALNUSQ65 MFR # FHALNU-SQ65
Alpine Astronomical Baader 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter (65mm Square, Unmounted)

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Expected availability: 2-4 weeks

Product Highlights

  • For Deep-Sky Astrophotography/Imaging
  • 656.3nm Centered Wavelength
  • For f/10 to f/3.5 Optical Systems
  • NOT Safe for Solar Viewing
  • Improves Contrast of Dim Objects
  • Eliminates Light Pollution and Moonlight
  • Dielectrically Anti-Reflection Coated
  • Planeoptically Precision Polished
  • Unmounted for Custom Applications
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Wavelength: H-alpha

H-alpha Oxygen-III

Not available with current selections

Sulfur-II

Not available with current selections

Size & Mounting: 65x65mm Square, Unmounted

1.25" Eyepiece Filter Mount

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2" Eyepiece Filter Mount

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31mm Round, Unmounted

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36mm Round, Unmounted

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50.4mm Round, Unmounted

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50x50mm Square, Unmounted

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65x65mm Square, Unmounted

Bandpass: 3.5nm

3.5nm 35nm

Not available with current selections

4.5nm

Not available with current selections

7nm

Special Order

8.5nm

Not available with current selections

8nm

Not available with current selections

$0 VA Sales Tax Collected on This Item
$759.00
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Alpine Astronomical FHALNU-SQ65 Overview

  • 1Description

Centered on the 656.3nm wavelength and passing an extremely narrow bandwidth, the 65x65mm square and unmounted Alpine Astronomical 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter is ideally suited for use with full-frame CCD and CMOS imaging sensors on optical systems, including telescopes and astrographs of all configurations and apertures, ranging from a super-fast f/3.5 to a more moderate f/10.

Planeoptically polished and dielectric anti-reflection coated, this filter uniformly passes the maximum amount of the bandwidth possible to virtually eliminate halos, reflections, and ghosting to reveal details of wispy nebulae and dim stars that filters with wider bandpasses cannot resolve. It also completely rejects light pollution and blocks longer interfering wavelengths, enabling even the faintest deep-sky objects to be imaged regardless of where you are located or whether the moon phase is normally unfavorable. This version of the Ultra-Narrowband H-alpha filter is offered here as an unmounted 65x65mm square option for custom applications and imaging systems.

This filter is intended only for deep-sky astroimaging with CCD systems, and should never be used for direct solar viewing or solar photography as permanent injury to your eye and equipment can occur, up to and including blindness.

In the Box
Alpine Astronomical Baader 3.5nm Ultra-Narrowband H-alpha CCD Imaging Filter (65mm Square, Unmounted)
  • Baader Stackable Filter Box
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

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