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Alpine Astronomical Baader f/2 Highspeed H-alpha Filter (31mm Round, Unmounted)

Alpine Astronomical Baader f/2 Highspeed H-alpha Filter (31mm Round, Unmounted)

B&H # ALFHALHSRD31 MFR # FHALHS-RD31
Alpine Astronomical Baader f/2 Highspeed H-alpha Filter (31mm Round, Unmounted)

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Expected availability: 2-4 weeks

Product Highlights

  • Ideal for Astrophotography and Imaging
  • Centered on the 656.3nm Wavelength
  • Designed for Use on Fast Astrographs
  • NOT Safe for Solar Viewing or Imaging
  • Dielectric Anti-Reflection Coated
  • Unmounted for Custom Applications
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Size & Mounting: 31mm Round, Unmounted

1.25" Eyepiece Frame

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2" Eyepiece Frame 31mm Round, Unmounted 50.4mm Round, Unmounted

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50x50mm Square, Unmounted

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Wavelength: Hydrogen-alpha

Hydrogen-alpha Oxygen-III

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Sulfur-II

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Filter Set: H-a, O-III, S-II

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$209.00
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Alpine Astronomical FHALHS-RD31 Overview

  • 1Description

Optimized for use on fast astrographs for astrophotography and imaging, the Alpine Astronomical Baader f/2 Highspeed H-alpha Filter isolates this narrow 656.3nm wavelength to improve the visibility and contrast of faint and wispy nebulae, even in heavily light-polluted areas. This filter is ideal when used on Celestron's Rowe-Ackermann Schmidt Astrograph (RASA), or with Hyperstar-equipped Cassegrains.

When conventional narrow-band filters are used on fast optical tube assemblies, there is usually significant transmission loss due to strong center-wavelength shift. To counter this, the Highspeed H-alpha filter is designed to be pre-shifted to bring them back on band when used with f/2 to f/3 optical systems. The filter surface is dielectrically coated with anti-reflection coatings to transmit the maximum amount of light throughput, and precision planeoptically polished to limit distortion and color fringing. This version of the filter is offered here as an unmounted 31mm round option for custom applications and imaging systems.

This filter is intended only for deep-sky astroimaging and photography equipment, 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 f/2 Highspeed H-alpha Filter (31mm Round, Unmounted)
  • Baader Stackable Filter Box
  • Limited 2-Year Warranty
  • Table of Contents
    • 1Description

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